A supermarket operator from Ahlbeck (Usedom) is found dead, naked, in the spa gardens of neighboring Swinemünde in Poland. Inspector Julia Thiel and her Polish colleague Marek Wozniak are investigating together. Only initially does everything look like a sexual offense. The woman wanted to meet one of her cashiers to offer her a new apartment in Poland in exchange for an old, run-down house on the German side. However, it is said that the inspection of the apartment never took place. A case that particularly challenges Julia Thiel.

High season on Usedom. Sophie Thiel has accepted a holiday job and waits tables in the café on the Heringsdorf pier. She becomes friends with her young Polish colleague Jadwiga Gryn. After work, they make their way home together on their bikes. Shortly after the girls have parted ways, Jadwiga is ambushed, drugged and kidnapped.The search for the missing person is the first job that inspector Julia Thiel takes on again after her serious accident. Jadwiga's friend Christoph Dierwald fears the worst.

Former public prosecutor Karin Lossow is released from prison after several years in prison. She had once shot her husband with her daughter Julia's service weapon because he had slept with another woman. To the surprise of her probation officer and her daughter, she does not move into a new apartment in Rostock as planned, but returns to her home in Usedom in the "Mörderhus". Not only to the displeasure of her daughter, who has not yet been able to forgive her mother for what she did. Karin has to put up with derogatory looks and comments from the islanders. She herself sees Usedom as a second chance for her life and soon has a good connection to her environmentally conscious granddaughter Sophie, who supports her with legal tips during a protest. Karin also finds work in a bison enclosure, takes care of the animals and controls entry. Julia has to clear up the death of Thomas Krenzlin. The young paraplegic man is found drowned in the water.

After her divorce from local politician Victor Braydon, Simone Eggebrecht finds stability in her work with the disabled and in her friendship with Wiebke Siehl, who is paralyzed. Simone's plan to build a hotel for the handicapped in a prime location is torpedoed by anonymous acts of sabotage. She hires Patrick Horn as a security guard. When the young man disappears, Simone blames her ex-husband and his party colleague Enno Littmann and involves Commissioner Ellen Norgaard and her colleague Rainer Witt in their War of the Roses.