Hunting Flies (1969)

Wlodek is a young 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 Wlodek 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 Wlodek upon his return home.