Franco and Ciccio are the directors of a driving school. They suffer the theft of the only car they have, and their new car is prone to going completely out of his control.

Franco and Ciccio work as waiters in an inn in France. The day Ciccio officially takes French citizenship, the First World War breaks out between Germany and France and all citizens are forced to enlist.

A string of violent jewel robberies force Police Inspector Parrino to get rough with the city’s criminal scum. Things take a turn for the worse when he’s confronted with the murder of an prostitute.