The tranquil Frisian village of Pilsum is shaken by a brutal murder. An attractive young woman is found next to the lighthouse, strangled with a belt in a bestial manner. A dark red, sensually appearing kiss mark is prominently displayed on the forehead of the deceased. What does this symbol mean? Tammo Anders and Fenna Stern from the Greetsiel criminal police begin their investigation. The murder victim, Silvia Lüders, was a guest at the Friesenliebe hotel. This establishment is a meeting place for those seeking partners from East Frisia, but instead of flirts and love, the detectives encounter jealousy and hatred. Is one of the guests at Friesenliebe the perpetrator? Is a serial killer on the loose in East Frisia? The detectives investigate in all directions as the perpetrator strikes again.