Rebecka's replacement gets somebody to confess to the murder, but Rebecka's own under-the-radar inquiries have come up with a different motive involving a family inheritance.
A young couple of divers are trapped and drowned under the ice by a mysterious figure. Rebecka and Wilma investigate and find out that the divers were examining the wreck of a Nazi plane.
Rebecka is getting ready to move in with Måns, but she comes across a horrible crime scene after her neighbor sees something amiss in a nearby house. Unfortunately, she is prevented from investigating because of her pending departure.
Lin's husband is the prime suspect, as he was 16 years ago, but there is not enough evidence to charge him. The search continues for the murder weapon.
Mella worries about her daughter's safety when an informant turns up dead after arranging to meet with Mella. After a breakdown in Stockholm, Rebecka returns to Koruna, she has important decisions to make about the future.