A young garage owner, Henri, whose business is not going well, fixes the lovely Gloria's car on the road. She suggests he let part of his garage to her friends.

A lieutenant, at the head of a commando ready to land in France, finds among his men a maquisard who had tried to kill him in the past.

She dragged out a more than mediocre life in the port of Antwerp; he is a renowned pianist-virtuoso. These two solitary beings, totally different, meet by chance on a liner and gradually realize that they complement each other harmoniously.

Le Havre, France, in 1949. In a town that still shows the scars of war, several friends meet up in Albert's café. One of them, Laurent, has lost his job on the docks and his marriage to Madeleine is falling apart. He knows that his wife wants to start an affair with friend, Jean Sauviot. Jean is a lonely man who is attracted to Madeleine but doesn't want to commit himself to the wife of a friend. On the day that Madeleine tells her husband that she is seeing Jean, Laurent goes looking for Jean to find an explanation. Arriving on the docks in the evening, he attacks an American sailor who looks like Jean, but the man fights back and runs away after killing Laurent accidentally. Madeleine thinks that Laurent was killed by Jean and believes that she can start a new life with her lover. The police have other ideas...

Géo Paquet, aka The Gorilla, breaks from jail. Now an escaped convict, the elite agent must infiltrate a dangerous gang working for a foreign embassy as their leader, a spy enjoying diplomatic immunity, can't be arrested by regular police.

A distress call from a trawler leads various people to come to the crew's aid.