Twenty-year-old Elya is a student and a future ecologist. One day, Matvey, the head of a construction company, comes to her university to talk about a development plan on the site of an old forest park. Elya does not hesitate to smash his project to smithereens. Matvey is intrigued by the girl's self-confidence and uses his usual methods of influence - he simply tries to "buy" her. But Elya doesn't need a sponsor. Then Matvey, surprised by her impregnability, offers Elya a bet: seven romantic days according to his rules. If after that the girl still decides to leave, he ...