There is a fire on Usedom: Karin Lossow's thatched-roof house is on fire. She manages to escape from the house at the last moment with Ellen Norgaard's help. Karin has suffered smoke inhalation and is immediately taken to hospital.

Ulf, Eva and Renate, all in their seventies, are partying hard during a camping trip in Poland. The next day, Ulf, confused and distraught, is found by hunters at the edge of the forest. He believes he has killed someone.

The prominent TV presenter Sandra Berger is dead. Gardening entrepreneur Britta Hausmann finds the TV lady beaten to death in her Usedom vacation home. Chief Inspector Ellen Norgaard is shocked when she meets the dead woman's husband, the equally well-known TV presenter Jonas Gomez, at the crime scene. The two are connected by the well-kept secret of a passionate affair. Karin Lossow senses that Ellen is in a bad way. The detective pours her heart out to her friend. Nobody at the police station suspects that Ellen was seeing Jonas Gomez at the time of the crime. It would mean the certain end of her career in the police force and the probable end of the career of her lover, who has no alibi for the time of the crime and is also being blackmailed.

School secretary Annett Ludwig is jogging by the sea. She discovers a dead teenager under a steep cliff: Theo Jacobsen, a pupil at her school. The 17-year-old was considered an inconspicuous outsider. Karin Lossow knew Theo from commercial school, where she led a course on legal issues as part of a project week. By chance, she had witnessed a bullying attack on Theo, who was at the top of his class, and offered to help the boy. Rainer Witt and his colleagues Holm Brendel and Dorit Martens investigate Theo's laptop. It turns out that he was engaged in a lively trade in test questions, which he sold to his classmates and made thousands of euros in profit. To do this, the alleged model pupil used access to the headmaster's surfer - only school secretary Ludwig knew the password.

Police sergeant Holm Brendel follows the trail of prominent Swedish crime writer Arvid Johansson in Ystad. Former public prosecutor Karin Lossow accompanies Holm on the private trip. On the ferry back to Usedom, she meets Dana Driest, a native of Poland. She has a conspicuous hematoma on her cheek. Was she a victim of domestic violence? The next day, Karin sees Dana's husband Jochen driving off the ferry in his SUV - without his wife.

Steffen and Ben have gone on a missionary tour throughout the godless land of East-Germany. The Christian denomination was only recently joined by Steffen, who is now expected to prove himself accompanied by the more experienced Ben. Pairing bible-believing strictness with teenage slang and Christian hip-hop, the two of them are off to to make Jesus known in the rural villages. When Steffen turns out to fail in his public prayers and preachings, however, a dangerous dynamic starts to form between the unequal men.

Nina (38) loves her little family and is passionate about her job as an architect. When she returns to work after parental leave, she is able to save the office from bankruptcy with an ingenious idea. The only catch: she has to pretend to be single and married to her work. Nina gets no help from her husband Torsten (38) because he sees her dream job as a threat to the family. In desperation, Nina pretends he is her brother and secretly hires granny-for-hire Irmgard (70). Between lies and success, Nina's life picks up so much speed that she soon can no longer find the emergency brake.