Oksana, without warning anyone, returns home from Poland. Parents did not expect to see their daughter. On the field, the girl's father meets his old enemy, and Oksana sees her classmate Maxim in the car. A friend persuades a girl to go to the Ivan Kupala holiday, which was organized by her father's enemy. But they do not yet know that on the holiday ardent love will be born and family feuds will be renewed, and the most terrible thing will happen - war will come to their homes.