In a rental house in Kiel, Klaus Borowski (Axel Milberg) and his colleague Mila Sahin (Almila Bagriacik) find 40-year-old insurance employee Andrea Gonzor shot dead on her bed. Andrea Gonzor had apparently invited people to an erotic party that evening – numerous traces of sperm around the dead indicate that the victim had several sexual partners that night. There are traces of alcohol and sedatives in her blood, but there is no evidence of a sexual offense. Borowski and Sahin delve into the world of sex and love addicts. The only key to solving the problem seems to be Andrea’s girlfriend.