Investigation is her hobby. But Larisa Kotova, the owner of a fashionable restaurant in the city, does not take on every business. It should definitely interest her. And then... An acquaintance of the husband, a retired colonel, and now a successful businessman, asked simply to find out whether the man his daughter’s fiancé is the one he claims to be. For Larisa, such a check is just a day of work. However, Larisa reveals new nuances in the case. Having quickly learned the biography of Arif Huseynov and not finding any crime, however, having found out that he is a typical gigolo, she faces the question - who killed his wife? And soon before another - who took his brother’s life and for what, stabbing him with a dagger in the same way? And Larisa, pulling one thin thread, begins to unwind this ball...