1951 film by André Berthomieu

1955 film by Alfred Rode

1978 film by Daniel Daert

American FBI agent Lemmy Caution arrives in France to track down a dangerous spy.

Naive and good-hearted Léon Ménard arrives in Paris, determined to find work in the capital. In a café, he meets Bob, a seedy guy, who helps him to get a job. On cloud nine, the ingenuous young man, does is unaware of how Bob manipulates him. Having become the night concierge of a hotel, the thankful Léon lets Bob and his accomplices get into the pace. Jewels are stolen as a result.When he is accused, Leon refuses to incriminate his "friend". Fortunately, Charlotte, Léon's fiancé, manages to find evidence of Bob's guilt and thanks to a premium paid by the diamond dealer the two lovebirds can buy a grocer's shop and tie the knot.

1972 film by Édouard Molinaro

A prisoner escapes and kidnaps a woman with her he falls in love. He's involved in a bad business where politicians and underworld are leading the dance. He'll die like the albatross in Baudelaire's poem.

Friends since infancy, two youngsters struggle as their platonic bond blossoms into romantic love with adolescence.