A student of veterinary and his girlfriend meet Sanja in the park, the wife of his friend. The student starts some sort of romance affair with Sanja, which makes things complicated. Meanwhile, Sanja's husband has mistress as well. One night, Sanja takes the student to her mother's apartment, where they suddenly meet her husband and his mistress. The meeting of four lasts until dawn with fights, hits, reconciliation and a game of cards... After that, everybody decide upon their own future.