Marcello, a shy tenor, is afraid of singing in public. Two friends of his think of having an elegant youth on the stage pretending to be singing while Marcello dubs him behind the scenes. The scam is successful but after a while Marcello summons the courage to go on stage himself.

Three young men - Jacques, Pierre, and Michel - share an apartment in Paris, and have many girlfriends and parties. Once, during a party, a friend of Jacques' tells him he has a quite compromising package to deliver, and asks him if he can leave it discreetly at their place. Jacques agrees and, as he works as a steward, flies away for a one-month trip in Japan, telling Pierre and Michel about the package. Then, one of Jacques' former girlfriends drops a baby before their door, making Pierre and Michel believing it is the package they are waiting for. Their lives are then completely changed.

During World War II, two French civilians and a downed British Bomber Crew set out from Paris to cross the demarcation line between Nazi-occupied Northern France and the South. From there they will be able to escape to England. First, they must avoid German troops – and the consequences of their own blunders.

Three London gentlemen take a vacation rowing down the Thames, encountering various mishaps and misadventures along the way.