Housewife Tatyana finds out that her beloved husband, city hall official Ilya Klimov, has been cheating on her with his secretary for a long time. He goes to his mistress and asks Tatyana to vacate the apartment that he got from his parents. For the first time in twenty years, Tatyana has to look for work - she received an education in the field of criminology, but due to her husband's ban, she never used her knowledge in practice, and her passion has always been detective series. With the help of her uncle, a police lieutenant colonel, Tatyana gets a job in a forensic laboratory. Major Bologov, knowing that she was organized "through connections," intends to achieve her removal.