Borowski's last case, which involved a murder immediately before the opening of the Kiel Week, led to his colleague Sarah Brandt being transferred. In order to escape the trouble in the police station, Borowski falls into a case that leads him into the wide landscape of the North Frisian Wadden Sea. A man was found dead on Suunholt, a small, sleepy North Sea island near Denmark. He is no stranger to Kiel: Years ago, Oliver Teuber was the key figure in a corruption scandal. Apparently Teuber had found a new life and a new love far away from Kiel. On Suunholt, Kommissar faces the completely distraught Famke Oejen, who found her lover lifeless in the bathroom of their shared apartmentHas. Borowski is drawn into the mysterious atmosphere of the strange islanders.
Famke Oejen is said to have slept with countless men. The young woman, who is grieving with an almost self-destructive passion, urges Borowski to help her find out the truth about Oliver Teuber. Regardless of the dangers she faces, she accuses the other islanders of ruining their happiness out of sheer envy. Famke is obviously in a nervous state of emergency and her statements about the night of the crime have gaps. Nevertheless, the completely isolated woman succeeds in appealing to Borowski's protective impulses and promptly gets him into serious trouble.