1952 Italian film by Vittorio De Sica

During the bombing of Naples in World War II, a cynical businessman helps a naive prostitute, who spends the next two decades desperate to have him reciprocate her feelings.

Unemployed Antonio is elated when he finally finds work hanging posters around war-torn Rome. However on his first day, his bicycle—essential to his work—gets stolen. His job is doomed unless he can find the thief. With the help of his son, Antonio combs the city, becoming desperate for justice.