Inspector Littlejohn is back on the Isle of Man, but this time it's official.
Finlo Crennell is one of the most popular men in Castletown. For many years, he was the harbourmaster of the port and appreciated as much for his pleasant personality as for his capabilities. Now he's retired, widowed, and lives with a housekeeper. Like most retired men, he's still interested in his former profession. He spends his days at the harbour, seeing what ships are coming and going. At night he meets with old friends at a local pub for cards and a few drinks.
When he goes missing, the town is in shock. What could have happened to an elderly man who stuck to his daily routine? A week later, he's found in London. A Dutch ship has picked him up in the water, unconscious, but alive. Instead of returning to Castletown, the ship went on to its next stop (London) and left the old man there. He's OK, but he's lost his memory.
He has no identification papers, but responds when Inspector Littlejohn speaks to him in Manx. With that information, Scotland Yard is able to tie him to a missing persons report from Castletown. Littlejohn is assigned to take the old man home. It's hoped that the sight of familiar places and people will restore his memory. Maybe it would have if someone hadn't shot him to death first.
Local Inspector Knell is a great admirer of Thomas Littlejohn and he begs Scotland Yard to let the Chief Inspector stay to lead the investigation into the murder. Everyone's agreeable and Littlejohn looks forward to spending time with his old friend Caesar Kinrade, Archdeacon of the Isle of Man.
The Archdeacon knows the history of everyone on the island, so he's a great source of information. He attests to Finlo Crennell's popularity and decency. Crennell only blotted his copybook on one occasion. At a drunken party, he impregnated his wife's younger sister Mary. His wife was unable to have children and she agreed to raise the child when Mary left the island. Even the conservative islanders think it was a good solution and admired the love that Finlo lavished on his daughter Nancy.
Nancy is married to a man whose unproductive farm has left them deeply in debt. She has three small children and would prefer to move to a location with better farm land, but her husband is stubborn. He asks his father-in-law for a loan and is promised the money.
When Littlejohn and the Archdeacon go to tell Nancy about her father's death, she's distressed that her husband has failed to come home overnight. A search finds his body. Like Finlo Crennell, Charlie Cribbin has been shot in the head.
The trail leads to the Dutch ship that picked up Finlo Crennell. It's important to find out what happened to his wallet. He'd drawn his life savings from the Castletown bank, but it's missing. The captain of the ship is dead, too, but his First Mate claims that he kept the money to return to Crennell but forgot to give it to him. No one believes that story, but the money is back. If Finlo Crennell drew it out of the bank to give to his son-in-law, who was Charlie Cribbin meeting when he was murdered?
Nancy Crennell Cribbin's mother Mary is back in town. She has a confession to make to her daughter. She also has a new husband, a shifty character who's determined to go through Finlo Crennell's papers. Meanwhile the Dutch ship is back in town and several people are interested in meeting with the former First Mate (now Captain) of that ship. Obviously, someone believes that not all of Finlo Crennell's possessions were returned.
A wealthy ship builder is raising hell because no one's been arrested for Finlo's death. It looks like Littlejohn and Knell are getting "warm" when someone takes a shot at Littlejohn.
The solution to all the crimes lies in an old deception. The people involved thought they were safe, but old sins really do cast long shadows. There's always the danger that someone will learn the secret and try to use it against you. How many people are you willing to kill to cover up past misdeeds?
Surprisingly, Sargeant Cromwell doesn't join Littlejohn in this book, but Inspector Knell is a fine substitute. He's a shrewd copper and with the Archdeacon's local knowledge, Littlejohn finally has all the pieces to the puzzle. I've liked all the books in this series so far, but I especially love the ones set on the Isle of Man.