Matvey is a young man who is in love with his colleague Sveta. But Sveta rejects him because he is fat. Matvey decides to lose weight, and enrolls in a fitness club, where he meets coach Julia. Yulia has a dark streak in her life: her boyfriend cheated on her, his loan is hanging on her, the director at work harasses her. Therefore, Julia agrees to become Matvey's personal trainer and live with him.