Patrik and Erica are expecting their first child when the body of a woman is found in a rock cleft - with two more skeletons hidden underneath. A lobster net brings up the body of a child off the coast. At first she appears to be a victim of an accidental drowning, but the investigation soon points to murder. Patrik and Erica are making wedding plans when a deadly car crash occurs. The case is almost written off as a tragic accident, but a series of strange circumstances leads Patrik to discover that the driver was actually murdered, and that a serial killer may be back in action.