Ruben convinces Romy, a German army pilot, to show them evidence of supernatural phenomena on the Poppenberg. This is where the Pied Piper disappeared with the children in the medieval times. In their search for further clues, Inspector Erik Zastrow gets in their way. But Ruben's father is not their the only problem, because Finja, Jannik and Ruben are under attack from ghost children. - Dr. Jamila Jost, Romy's mother, has a terrible premonition.
