Retired teacher Ulla is celebrating her golden wedding anniversary with her husband Paul. Unfortunately, Ulla's romantic idea of renewing their vows backfires, as her husband has fallen in love with Ulla's best friend.

At the beginning of the weekend, the detective commissioner Tina Campenhausen wanted to spend with her family, she is called to a hotel in Travemünde. Guest Brederstein lies dead in the tub. Everything points to suicide. Tina Campenhausen knows the dead that she keeps secret from her colleague. Tina is caught up in her past when her sister, Jenny Hansen, whom she has not had any contact with for years, is at her door. Does Jenny have something to do with the death of the hotel guest? Tina gets into the biggest conflict of conscience of her life.

Antonia Hofmaier and her son Linus actually only want to pay a short visit to the North Sea island of Langeoog: Antonia needs the signature of her father, with whom she has had no contact for almost twenty years, to sell her parents' house in Munich.

It happened twelve years ago: During a trip to the beach, 3-year-old Michelle Minrath disappeared without a trace. After an intensive search it was assumed that she drowned in the sea. But her mother Stefanie always firmly believed in finding her again. Her husband Torben advises her to get help, as her mania destroys the small family that still exists with the other daughter, Angelina. While working in the supermarket, Stefanie notices a girl in whom she thinks she recognizes her grown up daughter. She secretly follows her. When the police are called in, it finally turns out that it is actually Michelle who was kidnapped by her current mother, Ruth, who now offers her a well-protected home. A world collapses not only for the daughter, who suddenly no longer knows where she belongs, but also for two families at the same time a lot changes and an emotional roller coaster ride begins with an uncertain outcome.

The dark secrets of a seemingly peaceful island threaten to swallow up an orphaned student when he grows close to a mysterious new teacher.