When the pictures from Bergamo in Italy go around the world in spring 2020, even non-medical people know what the word pandemic means. The previously unknown Coronavirus is spreading rapidly across the planet. Four days later, exit and contact restrictions also apply in Germany. Since then, the life of the Konstanz intensive care physician Dr. Carolin Mellau and her family on their heads. The female doctor becomes a member of the crisis team and is on duty around the clock to prepare the clinic for the impending emergency. As an anesthesiologist intubating those infected with COVID-19, she herself carries a high risk of infection. Meanwhile, her husband Stefan has to cancel his concerts as a musician, is no longer allowed to teach his music students and is suddenly sitting at home without an income. Teenage daughter Luzy is not allowed to see her Swiss boyfriend because the border is closed. She and brother Tim cannot go to school. But the worst case for the family is yet to come.

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.