Major Nastya Kamenskaya is the most beautiful detective of Moscow criminal police. She is as attractive as intelligent and shrewd. Kamenskaya investigates suspicious deaths and disappearances in a psycho-clinic, finds a maniac who chases fans of a pop-group, unravels chain of drug-addicts` kidnapping. In the last part of the film the insane murderer sentences people to death for each of seven Bible`s mortal sins. Six people are already dead. Nastya discovers that the seventh victim is herself. The screen version of best-selling novels of "Russian Agatha Christie" Marinina became a TV best-seller as well.