Sauerland, autumn 1995: In the middle of the forest on the Wilzenberg, a walker finds the body of high school graduate Sonja Risse. However, the fact that the killer left a music box with the lullaby "Hush Little Baby" at the crime scene does not lead to a clear solving. 25 years later, the investigative journalist Stefanie Schneider, known as "Mütze", made a surprising discovery in Cologne. In a disused multi-storey car park, she films an undressed corpse of a man with a music box running next to it! When her colleague Jan Römer, who reported on the spectacular Sonja case as a young journalist in 1995, recognizes the melody from back then, he immediately believes there is a connection. He goes to Wilzenberg with his ambitious colleague to interview Sonja's mother Maria, her former teacher Waldheim and her best friends. The more the journalists compile, the clearer the contradictions and gaps that the investigators should have noticed at the time.
The wife of the Düsseldorf Police Council Rainer Bachmann is kidnapped. While trying to save his mother Monika, the adult son is shot dead. His widow Nicola desperately seeks support.
Christoph begins his year of civil service at a nursing home as the personal caretaker for 28-year-old Sven. The seriously ill young man is suffering from muscular dystrophy and his nursing room has become his own little microcosm which he has been sovereignly controlling for years.
36-year-old Birgit desires nothing more than an intact family. Since she lives with her husband Andreas, the common child Philip and Sarah, her daughter from a previous, failed relationship in solid economic conditions in a terraced house, she feels very close to her ideal. Through Sarah's puberty, the family is put to the test. But Birgit believes that luckily only the formal confirmation of the adoption of Sarah by Andreas is missing.
Seduced by the challenge of an impossible case, the driven Dr. Carl Jung takes the unbalanced yet beautiful Sabina Spielrein as his patient. Jung’s weapon is the method of his master, the renowned Sigmund Freud. Both men fall under Sabina’s spell.
