Susanne Elvan (Nesche Demir) met her husband Tarek (Sahin Eryilmaz), a convicted violent criminal, through a pen pal portal while he was in prison. The wedding took place before he was released. When Susanne is found murdered, Tarek has only recently been released. The case seems clear for the chief inspectors Max Ballauf (Klaus J. Behrendt) and Freddy Schenk (Dietmar Bär). There is much to suggest that Tarek has his wife on his conscience. But when assistant Norbert Jütte (Roland Riebeling) sees that the murderer has tied a belt over his victim's eyes, the case takes an unexpected turn: Jütte remembers an earlier case and is convinced that he had already met the murderer before had to do.