Police murder in Dortmund: Two officers are shot dead in their patrol car in the middle of the night. Only a short time later, the homicide team is on site. There is no trace of the perpetrators. But the light is still on in a small private bank not far away. Inspector Peter Faber tries to get in touch with the man who is working feverishly on the bank's computers. But Muhamad Hövermann ignores Faber's request to open the door. The inspector suddenly smashes the window pane. When he stands opposite Hövermann, Faber realizes that the bank clerk is wearing an explosive belt. Hövermann threatens to set him on fire and refuses to be deterred from his work on the bank computers. A race against time begins.
Martina Bönisch immediately requests a SEK and bank director Minssen reports that Hövermann converted to Islam a few years ago for the sake of his wife. While Faber stays in the bank with Hövermann, Nora Dalay and Daniel Kossik get in touch with his family. The heavily pregnant wife Hanifah, stepdaughter Ada and Bernie, his adult son from his first marriage, are supposed to persuade him to give up. There are new clues: One of the fugitive police killers could be in the Al-Umma Mosque. And Hövermann's explosive device can also be triggered by remote detonator - if he doesn't complete his mission in time...