Choir director Johanna Bischoff and her girls choir go to a concert in their hometown Hameln. Shortly before the scheduled performance disappear four of the girls and the organist David.Sie were on a hike in a cave of the Ith - the fabled mountain, in which 700 years ago the Pied Piper is said to have led the children. Seeking help, Johanna turns to her ex-boyfriend Jan Faber, head of the police station in Hameln.

Kathrin is almost 40 and the mother of two teenagers. Since breaking up with her ex, who wants to sneak back into the family, the journalist has been in a relationship with the much younger Luca. He is not a "toyboy", but the love of her life. Unfortunately, there is one problem: Kathrin is not getting her money's worth in bed. To avoid offending Luca, she fakes an orgasm for him. But that's no longer possible: an Asian remedy for skin rashes means that Kathrin can no longer lie. Her life goes completely off the rails...

In this prequel to the TV series, the individual fates of the members of the later "Red Bracelets" and how they came together are told.

Jessica knows exactly what her life is supposed to look like and where it takes her. But then she meets Danny. He has a complicated past and could confuse all their plans. Jessica has to decide.