Set and filmed in Sofia, Bulgaria, the story follows the murder investigation of a famous writer, Peter Doncev's (Fabio Testi) wife, who is killed in a hotel room where she spent the night with her lover. As Inspector Ivan Zanova investigates, he discovers that Peter and his late wife were estranged and considering divorce. Both partners maintained extramarital affairs—Peter with a woman named Milena (Anna Maria Petrova), and his wife with her lover. The investigation unravels a chain of jealousy, blackmail, and secondary murders within their interconnected social circle.