When the body of Ulrike Andersson, who had been missing for seven years is found, a case comes to the light of day, that the public prosecutor Mehlhorn dealt with at that time and was convinced that the husband, Gunnar Andersson, killed his wife. However, since no body was found, the culprit was acquitted. Mehlhorn legally can't investigate anymore against Andersson. So, he asks Bella Block to bring him to a confession. It's the only chance to reopen the case and arrest the suspect.