It is a sultry summer's night in Berlin. In an elegant suburb the former youth court judge Fred Lenowsky and his wife Greta are shot in cold blood by a cloaked figure. The police are baffled. Meanwhile, in the provinces, the former social worker Rebecca Brandt feels unable to cope with the death of her beloved husband Felix and resolves to put an end to her life. However, before she can carry out her plan she has an unexpected visitor: Maximilian Kemper, an old friend and former workmate of her husband. He explains that on the way here he picked up two hitchhikers, a young couple called Marius and Inga, who now ask to camp in Rebecca's garden. Rebecca has no objections. She doesn't realize that 10 years ago she was the one who placed Marius with foster parents and that his appearance is not a coincidence.