On the eve of the wedding, Dasha receives an anonymous letter saying that the groom is cheating on her with one of her close friends. Dasha has two close friends: Zhanna and Vera. She has been friends with both since childhood. And although they have a long-standing, almost family relationship, anxiety settles in Dasha's soul. She begins to take a closer look at her fiancé Maks and her girlfriends. Zhanna does not approve of her marriage. Maks is a handsome man, and women love him too much. Vera, on the contrary, is in favor with both hands. Maks is caring, smart, economical, he will be a wonderful husband and father. Dasha thinks Maks's romance with Vera is most likely. The bride begins surveillance.