The born detective Katarina Kopeikina, having found quiet female happiness under the wing of her husband, businessman Andrei Kopeikin, lived and did not grieve... if not for her mother-in-law Rosalia Stanislavovna. She is rude like a cab driver, impudent like a market trader, and on top of everything else she craves universal fame. This time Rosalia came up with the idea of filming a reality show on the theme “Happy Family” in Katarina’s country house. She had already resigned herself to participating in the imposed event, but a casual acquaintance dropped... a coat button in her car. Who would have thought that thanks to a tiny little thing, Kata would solve a series of heinous crimes?!