Summary:
2373: Prologue: While en route to DS9 from the Gamma Quadrant, an odd signal emanating from an unnamed planet piques Jadzia Dax's curiosity. The Defiant investigates and finds the Columbia NX-02 crash-landed in a desert, buried in sand for 200 years. O'Brien estimates it will take days to interface with it's computer; Kira feels like the ship is haunted. Before they can get anything working, Worf signals that Jem'Hadar attack ships are inbound, and they're forced to retreat.
2381: 7 years later, Ezri Dax, captain of the Starship Aventine, returns to crash site of the Columbia. Ezri became the captain after the original captain was killed in a Borg attack in the heart of Federation space 5 weeks prior. She hopes that the mystery of how the Columbia traveled so far so fast could answer how the Borg are traveling from the Delta Quadrant instantaneously.
Commander Sam Bowers is the Aventine's first officer; Dr. Sam Tarses the chief medical officer; Lt. Mikaela Leishman the chief engineer; Lt. Lonnoc Keddair the chief of security. Over 250 crew were killed in the battle with the Borg.
Dax tells Bowers that Admiral Nechayev has recalled them to defend Trill; 5 more ships have fallen to Borg attacks. They have 24 hours to download the Columbia's data core. Like before, the away team feels that the ship is haunted, constantly seeing flashes of blue light from the corner of their eyes.
2156: The Columbia NX-02, captained by Erika Hernandez, is escorting a mining convoy when they're attacked by Romulans. They use a computer virus to take over the Columbia, disabling it, then use it's own weapons to destroy the convoy. Just as the Romulans are about to destroy the Columbia as well, the chief engineer comes up with a plan to jump to warp immediately after detonating a photonic torpedo, so it looks like they were destroyed.
2381: Christine Vale, XO of the USS Titan, is still maudlin from the loss of Jaza Najem, who was left between on the planet Orisha in it's distant past. The Titan is continuing it's mission of exploration, months away from the front-line. Tuvok receives a report that the Borg have destroyed 5 more ships.
Xin Ra-Havreii visits Melora Pazlar in her zero-g stellar cartography lab to demonstrate the new holo-presence system he's installed throughout the ship, which allows her to go anywhere onboard without leaving her lab. She is pleased at how well it works, but when he leans in for a kiss, she rebuffs him. He's embarrassed; she is still emotionally vulnerable after Tuvok, psychically influenced by a spaceborn entity carried a star jelly, assaulted her a few months back.
Dr. Ree tells Riker and Troi that their baby has irreparable genetic abnormalities, and the fetus needs to be aborted. Having suffered 1 miscarriage already, Troi rejects the doctor's suggestion and Will echoes it, though she can sense he disagrees.
Vale questions Riker about his behavior, saying he's been acting off ever since Troi mentioned they were having trouble conceiving. He breaks down in tears and tells her what's happened, how he feels cut off from Deanna emotionally. They hug and he feels like it's more than platonic on Chris's side.
Troi meets with Tellarite counselor Pral glasch Haaj. His therapy style induces her into a fit of rage, but she she eventually admits that she resents her baby for failing her, after she's given it so much of herself. She says she won't terminate the baby and doesn't know why.
Captain Picard has been hearing the voice of the Collective since the Borg attacks began. Months earlier, he had become Locutus again to stop a new Borg Queen. Since then, Picard and Beverly, who is pregnant with his child, decided to start a family.
The Enterprise arrives at the planet Ramatis to find it annihilated, not assimilated, by a Borg cube. XO Worf quickly dispatches the cube with a bevy of transphasic torpedoes; the Enterprise is the only ship equipped with the torpedoes, which were reverse-engineered from those acquired from the alternate future Janeway. Worf suspects that the Borg attacks are building to a critical mass, and that there will be no stopping them soon.
The Aventine crew continue to feel a haunted presence on the Columbia. 2 crew members are killed when a lightbulb explodes with energy, and a ghostly aura electrocutes them to charred husks.
2156-2157: The Columbia's warp engines are destroyed, as is the subspace communications array. Half the crew and most of the MACOs were killed. Hernandez decides their best course of action is to head towards the nearest M-class planet 4 light-years away, using overclocked impulse engines--which will result in time dilation. For the crew it will take months to get to the planet, but on Earth it will be 12 years. The MACOs, unhappy with this decision, consider a mutiny.
2381: Pazlar gets an alert that a massive triquantum subspace distortion has been detected; the readings are similar to Borg transwarp conduits. Gravitational readings in the sector seem to indicate a star system, yet none is visible. Riker orders the Titan to investigate.
Lt Choudhurry deduces that the Borg are likely going to attack Korvat next, so the Enterprise tries to head them off. Later, Worf finds Choudhurry in the holodeck during his reserved time. She tells him she finds him intriguing and wants to learn anything he's willing to teach her. He begins his Mok'bara training program.
2168: After 63 days/12 years, the Columbia arrives at the M-class planet. They detect cities scattered across the globe, but a scattering field prevents them from detecting lifesigns.
An away team beams down into a dense primeval forest outside the alien city. The MACOs lead them on an intense 6 hour hike until they reach a clearing; a few kilometers away sits the austere alien megalopolis, levitating 100s of meters off the ground with no apparent entry.
A vaguely humanoid being descends from the city and welcomes them to Erigol. It says it's name is Inyx, and his people have observed them for their 12 year journey. He grants them entry to Axion and says his people are the Caeliar. Hernandez asks about repairing their ship, but Inyx says it will not be repaired, and they cannot contact Earth; the Caeliar wish to remain hidden from the rest of the galaxy. The Columbia crew will remain on Erigol as honored guests, but can never leave.
2381: As the Enterprise intercepts the cube about to attack Korvat, Picard hears the Collective in his head again and realizes this is just 1 of 5 targets. The Queen tells him humanity is to be exterminated.
At Khitomer, the USS Ranger uses a molecular phase inverter to slip through the attacking cube's shields at warp, turning the ship into a kamikaze missile and vaporizing the cube. Martok learns of their sacrifice and rallies the Council to support their Federation allies.
At Starbase 234, Admiral Paris sends an apology message to Tom just as the base is destroyed. The base manages to destroy the cube as well.
The Enterprise destroys the cube at Korvat, but not before 2 Federation ships are destroyed, and 10 million people on the planet are killed. They get word that Captain Calhoun's ship stopped the cube at Starbase 343. The crew is relieved that the battle is over, but Picard tells them it has only just begun.
Tuvok and Pazlar trace the Borg entry into Federation space to a supernova remnant that would also mask their presence. Pazlar needs to run more simulations to confirm.
Dr. Ree tells Troi that when she became impregnated by an unidentified energy being many years ago, whereby she had a child named Ian, her exposure to the being's radiation mutated her ova. He says she cannot have children, and that if the fetus is not removed soon, she could die. Troi leaves, and knowing the captain will likely support her, he contacts Vale.
Vale confronts Riker about Troi, and they have a heated argument. He says he'll try to talk to her again. Titan drops out of warp after they're hit by one of the high-powered sensor beams that Tuvok and Pazlar are studying. Their warp drive is disabled, as is their subspace communications array.
2168: The Columbia crew debrief. They've found that the Caeliar can change their shape, float, etc by using programmable matter consisting of nanomachines. They're unsure of the power source. They have unrestricted access to most of the city, but not the underground. They are all both artists and scientists, and don't sleep. Inyx interrupts them to say the Quorum has agreed to grant them an audience.
Hernandez pleas for the Quorum to wipe their memories and send them home, but to no avail. Ordemo says that many aliens have tried to beg for or steal their technology, and they've been forced to relocate whole civilizations to other galaxies in defense, which they find distasteful. They wish for their privacy to complete their "great work", which is to contact a civilization even more advanced than their own.
Inyx's companion for thousands of years, Sedin, disapproves of him allowing the humans on Erigol, saying he just wants them there for his own curiosity.
Major Foyle makes plans with the MACOs to take out the Caeliar scattering field by destroying its power source, so they can beam back to the ship. They still have grenades and are not worried about collateral damage, even if that proves to be the captain, who they decide to keep in the dark for now.
2381: La Forge tells Picard he detected sirillium on the hull of the last cube they destroyed. He traces it to the nearby Azure Nebula, and they set a course. Worf orders Picard to sleep, but he's afraid to let his guard down against the Collective. Picard tells Beverly that with their 1000s of ships, there's no chance the Federation can survive against the Borg's war of attrition. She tries to slap him out of it, saying they need hope for their son, but she can tell he doesn't really believe it.
Admiral Akaar tells President Bacco that Captain Calhoun tried to use the MPI maneuver to destroy a cube like the Ranger, but they adapted. He managed to destroy it with phased torpedoes instead, but Akaar doubts it will work again. He says the Enterprise is headed to the Azure Nebula on the tri-border, and Bacco asks for a meeting with the Klingon and Romulan ambassadors. Bacco introduces 7 of 9 as her new security deputy.
Martok addresses the Council. Despite earlier opposition, the Federation's sacrifice at Khitomer is enough for him to rally them to declare war on the Borg.
Several months ago, B'Elanna took her child Miral and left Tom Paris for a Klingon religious cult that believes Miral is the messiah. Tom's father Owen treated Tom as if it was his fault, and a rift opened up between them again. Tom receives a recording from his father apologizing, right before he's killed at Starbase 234. Already reeling from the loss of his wife, child, and Admiral Janeway, he is devastated.
Dax's crew finds a large section of the Columbia's logs are missing. They determine that the subspace tunnel is different from a wormhole in that it only exists in subspace, and it's powered by dark energy--the biproduct of which is hyperphasic radiation, which they estimate killed the Columbia crew in 20 seconds. They think the tunnel is still there, and set about finding how to enter it, and how to adjust the shields to block the radiation.
While performing maintenance on one of the Aventine's runabouts, another crew member is burned/liquified. Dax locks the ship down and tells Starfleet Command they're not leaving orbit until they find the intruder.
2168: Inyx shows the Columbia crew their Great Work, which allows them to observe and communicate with anyone/anything they discover. They coax out of him that the device is powered remotely, and that they bypass the scattering field with a phase-shifted soliton pulse. Inyx also says they're only days away from using the device, so the MACOs decide they need a plan fast.
The MACOs present their findings to Hernandez, and suggest that the subspace tunnels created by the Great Work could be used to travel back in time as well. The captain says she's not willing to violate the timeline and risk the Caeliar displacing Earth, and tells them to drop it. She says she's going to ask the Caeliar to bring down the rest of the crew.
Major Foyle decides to place the mission under military authority, and the other MACOs back him. They plan to deploy munitions before the big experiment, and Foyle will distract the crew--and kill the captain.
2381: Kadohata says all subspace frequencies are being jammed as they approach the Azure Nebula. Picard says there are no reinforcements coming, and that their sole mission is to stop the Borg's means of reaching Federation space.
Vale and Dr. Ree come up with a compromise wherein Troi will get daily injections of a drug to slow the baby's growth, delaying the need to terminate it.
Torvig creates an inoculation that will render someone assimilated immune to the psychological effects of assimilation. Since he has implants of his own, Torvig can't use the injection. He also suggests isolating Titan's system functions by shutting down the data network between them, so the Borg can't seize any console to access the ship's main computer.
2168: The MACOs bind and gag the Columbia officers and tie them together. Foyle decides not to kill the captain. They make their way into the Caeliar's apparatus, climbing the dome and descending into the opening with ropes. Inside, they encounter Caeliar, but since the MACOs' weapons pose no threat to them, they shoot off the foot of Lt. Thayer (a non-MACO who joined them) and threaten to kill her if the Caeliar don't cooperate with their escape plan. Being pacifists, the Caeliar agree and even correct their crude time-travel formulae, but say the Quorum will stop them before they can escape. Then one of the alien cities explodes and the Caeliar gestalt is filled with pain and horror.
Inyx frees Hernandez and the others, and says the MACOs sabotaging a node of the apparatus, destroying one of their cities. Hernandez begs Inyx to take her to the Quorom, and he obliges.
The Columbia beams up Foyle and Yacavino, along with a Caeliar prisoner. Foyle tells the crew to beam up the rest of the team, and says the captain and the other officers didn't make it. The rift in space-time opens in front of the Columbia.
In the Quorom, Hernandez convinces Ordemo to turn the scattering field back on and let her talk to the MACOs; he obliges. She tells the MACOs that the Caeliar will no longer cooperate, and orders them to end their game and kill Lt. Thayer. None of them can go through with it, so they surrender. Ordemo lets Hernandez contact her ship, and she explains to the crew what happened. Foyle and Yacavino are placed under arrest for mutiny. The transmission is interrupted when the Caeliar receive a tremendously powerful feedback pulse from the galaxy they contacted, which disrupts all of their technology; Inyx says the signal was sent with malicious intent, and their star system is being destroyed by a chain reaction in their solar and geothermal taps. Erigol will be destroyed, but he says they may be able to save the city. Graylock contacts the Columbia and tells them to break orbit and save themselves.
The Caeliar cities rise up but cannot enter the subspace tunnels until the time-manipulation equations are purged. Erigol explodes, and a number of the cities are destroyed by the subspace shock wave. The Columbia enters the tunnel and in a few seconds, the crew vanish into ash. Graylock tells the Caeliar that if they don't enter the tunnel now, they'll all be dead. A few city-ships enter the rift, but are mostly destroyed save for small sections that are shielded.
When they exit the tunnel, Inyx tells them they haven't moved far in space, but are 650 years in the past; the tunnel collapsed behind them. He says if not to save the humans, the Caeliar would've chosen to perish instead of altering the timeline. He says they will obscure their presence for now while they heal and rebuild.
The city-ship Mantilis, where Graylock and Pembleton are, crash-lands on a planet. The Caeliar Lerxst says that the 12 Caeliar and 6 humans are all that survived.
2381: The Aventine still hasn't been able to detect the intruder. The Columbia's transporter logs show a number of transports that account for the missing personnel, plus 1 extra. An explosion in shuttlebay 1 rocks the ship; the runabout blasted open the bay doors and headed for the planet, no life signs aboard. It emits a soliton pulse and enters the subspace tunnel; the Aventine pursues. They end up in the Azure Nebula in the Beta Quadrant.
Dax leads an away team over to the shuttle where they find a humanoid shape collapsed on the deck. It tells them it is Arithon of the Caeliar; it was taken as a prisoner on the Columbia. It says it did not mean to kill Dax's crew; after centuries of hibernating in the machines alone, it needed energy and didn't remember itself until the runabout gave it enough power to rebuild itself. However, it says that with the Gestalt gone, it was all for naught. It disintegrates into dust. The away team is beamed back when the Aventine receives a distress call from the Enterprise, which has engaged the Borg.
The Titan arrives to find Dyson shells surrounding a sun and a planet. They hail the planet and ask to meet, but get no response aside from a hatch opening. An away team consisting of Vale, Troi, Dr. Ree, Tuvok, Keru, Torvig et al take a shuttle in. Inside they find vast seas, plant and animal life, and a floating city. They land the shuttle outside and enter, where they're greeted by Caeliar and a human woman, who Tuvok recognizes as Erika Hernandez. She welcomes them to New Erigol.
Review: 5 stars. It's a real page-turner, with captivating mysteries on each of the 4 ships that all come together at the end, without resolving the main mystery of what exactly is going on in the Azure Nebula.
The story is very dense and there are tons of characters. The first time I read it, I hadn't read many of the preceding books or watched DS9, so I was constantly checking the character index in the back of the book. After getting caught up and re-reading, this book was even better.
The Borg aren't really in the story all that much, but every time they do pop up, it's intense: they destroy starbases and eradicate entire planets, and only the Enterprise has weapons that are effective against them. They feel scary again.
I really enjoyed this book, and can't wait to read book 2!