Alain is the only son of a wealthy bourgeois couple. He takes violin lessons in Ménilmontant, where he is spotted by Fleur, a poor girl: she is going to kidnap him and demand a ransom from the young man's parents, money which will be used to pay for a good lawyer for her brother accused of killing...
The film narrates the encounter between "La Tigra", a woman known by that nickname in the cafes of the port area for her character and her sharp claws, and Luis, a student of Fine Arts. There will be born a strong, passionate and necessarily brief relationship during which each of them will peek...
The love affair of an ex-convict with a showgirl, unleashes the jealousy of his older, wealthy and unbalanced wife. A murder plot, staged phoney suicide and other twists and turns follow.
