Chief Inspector Julia Thiel doesn't know whether a dead man is a murder victim, is an accidental death or has taken his own life; neither does her mother Karin, but she interferes in the case anyway.

Julia and a Polish colleague team up to investigate a case when the body of a local from Usedom is found in a Polish border town; Karin becomes legal counsel to the chief suspect.

When a cafe employee is kidnapped, one of her friends fears the worst; the burden of the past bears down on Karin when a gynecologist is found dead.

When Julia investigates a case of near-fatal maritime arson, she finds that the same yacht had been involved in a tragic accident 10 years ago.

A car that's escaping from the police after an illegal race hits a young man, who dies of injuries; Karin's car is hit and overturned, and her passenger vanishes.

Stefan hasn't heard from his wife in a while and is starting to worry; he learns she was hired privately to investigate the red light district.