In a rental property in Kiel, Klaus Borowski and his colleague Mila Sahin find 40-year-old insurance clerk Andrea Gonzor shot dead on her bed. Andrea Gonzor had apparently invited people to an erotic party that evening. Numerous traces of semen around the dead woman indicate that the victim had apparently had several sexual partners that night. There are traces of alcohol and tranquilizers in her blood, but there is no evidence of a sexual crime. Borowski and Sahin delve into the world of sex and love addicts. The only key to solving the problem seems to be Andrea's friend Nele. She discovered the dead woman.