Hunting Flies(1969)

Original title: Polowanie na muchy

Włodek is a middle-aged man stuck in a dead-end job at the local library who lives with his harridan wife and critical in-laws in a small apartment. When Włodek draws the interest of a library patron, the beautiful young woman encourages him to strive for better things in his life and professional career. Together, the two take off for a three-day affair, but surprises could await Włodek upon his return home.