They should've named this book: series of useless quests
Recap:
Mari and Aeri was making potions for the incoming battles when their home was invaded by an unseelie fae. He tried to throw a potion bomb at her but he kept on missing so he ran away and Mari chased her. She captured him near the firesouls' store and he said that her mother wouldnt stop until she had Mari, unless she came to her herself. Also, he got one last potion which he slammed to her arm, but Mari managed to get it off her sleeve before it touched her skin. However, a tiny amount of it got to her and she saw a vision of the Seelie kingdom in flames and when she regained consciousness, she saw Aeri, Cass, and Burn, along with the dead fae. She tried to find some answer on how to prevent the seelie kingdom from being razed to the ground but the answer involved her killing Tarron.
Then she went to Aethelred to ask about her new prophecy magic and he gave her a charm to control it and lead her to the right answer. He also said that if she wanted some insight about her mother, she should find some of her personal belongings or some place that connected her so Mari, Aeri, Tarron, and the firesouls went to the Night Circle again where Mari could touch the stone to find some insights. They were attacked by the unseelies and when Mari touched the stone, she was forced into the fae's realm. At least she found out that her mother planned to use eternal flames to destroy the seelie. Again, they were ambushed but the people who ambushed them seemed to be under her mother's influence. Also, her mother was coming but they managed to escape, even though Mari insisted the six of them could fight her mother.
After some healing, Arrowen came and Mari told her about the eternal flames. Arrowen said that the guardian of those flame would be Hestia, Vesta, Bridgid, and Arinitti. They could be found somewhere in Turkey, but the flames wouldn't be on their person, so of course they set out to Turkey. They found a satyr who was the only one who could give them the vision of the past if they want to pass safely, in exchange for a lyre from Tarron and the location of the girl he chased from Mari. The satyr said an evil woman just passed, but he didn't help her because she was, well, evil. They gave what the satyr wanted and they could see a colosseum and some ancient supernatural, but in exchange they could see them too and they hated intruders.
They got chased and they flew away. However, the moment they saw the storm, they ran away but Mari and Tarron had to land to got away from the storm. They found the Vesta's Virgin's temple but the virgins there were no longer virgin (it was modern world anyway and it was patriarchy's rule who forced vesta to be virgin). They tried to invite Mari and Tarron to their sex party but they refused because they were on a mission and asked the vestans' (not the virgins anymore) to tell them where the goddess were. So the vestans' told them to go to the pool of truth to tell their intention, but the pool sort of gave Mari a glimpse of the future that she would save both seelie and unseelie (duh -_-).
The vestans' approved so they told them to go across the plain but don't stay in there when it was already night because it was dangerous. Instead, they should stay the night in a temple in the middle of other temples and they could set out to find the goddesses in the morning. They crossed and had sex for the night and in the morning, they went through the tunnels but when they got out, they found the place to be under attack by unseelies. They found another temple and saw the four goddesses bound by her mother so Mari attacked her mother, but she got away. Mari tried to destroy their bondage but she got hit by the controlling potion again.
Tarron released the goddesses and one of them drove away Mari's desire to go straight to her mother. She said there was antidote but she needed to get some of her mother's blood. The goddesses also told them where the flame was, somewhere in mount chimaera, but for now, she had to get the antidote first from Connor, so the goddess made them a portal there (Mari was not allowed from transporting in case her mother took over and sent her straight to her mother). Connor said she just finished half of the antidote so she could take it first to repress the desire to go to her mother and while they waited for Connor, Mari told Tarron that she was fated to kill him, but he took the news calmly.
Aeri came along with an answer: the seelie's court historian. He told them the possible reason why Tarron was stabbed, it was because there was this dagger of royalty, that if imbued with eternal flame would be able to kill both Seelie and Unseelie royalty if stabbed to even only one of them. However, if the royal was stabbed, it would unleashed their magic and suffused the flames. After that, Aeri, Mari, and Tarron went to mount Chimaera, found the shepherd who took them to the top. Along the way, of course they were chased by some fire-breathing goats, faced some lions, some snakes, and the unseelies. They found her mother, who already got the eternal flame inside a crystal and she managed to escape again, not before they got her blood, though.
They reconciled with the others and prepared for battle. Connor gave Mari the potion, they all went to the seelie court, where they evacuated the citizens to the sky platform. Then unseelie came, Mari fought her mother, but she still managed to throw the eternal flames and it destroyed the building, and started to make their way up to the sky platform. Wounded, her mother still managed to escape, but Tarron forced her to stab him and it stopped the fire. However, it somehow drained her life too, but in her dying breath, Mari managed to try put some of Tarron's magic back to him.