Kat Halloway's husband's real wife comes to her for help tracing what really happened to Joe, having been told that he did not die at sea but had come back to England with a considerable amount of money.
We get to hear a lot of Daniel's backstory as well as Kat's. Coupled with the increasing closeness of their relationship, it gave this installment in the series a valedictory feel, but there is at least another novel and a novella still to come.