For weeks, the little Gundram has been missing without a trace. It's no wonder that Heidelberg's criminal investigator Gerlach is under pressure – the parents and the media are demanding results, and the public prosecutor's office is growing increasingly anxious. It’s not ideal for him that his daughters tell him about another possible kidnapping case: a little boy is said to have disappeared in the neighborhood of a friend. More and more evidence suggests that there is a serial offender at work. A race against time begins.