A watchman with a sensitive heart, Fernand falls in love with Violette and Pervenche, two of the daughters of his boss, Maître Arno. At a bullfight starring three attractive Spaniards, the girls and their sister Marguerite - with whom Fernand's companion Rémy is in love - compete in charm, to the despair of both suitors. Followed by Marina, a pretty girl who seems to take a keen interest in Fernand, the two friends decide to retire to Les Martigues, far from their belles. But soon annoyed by Marina's insistence, Fernand returns to Maître Arno's manade, while Rémy decides to become a bullfighter to win back Marguerite.

Alice Rémon, a pharmacist, is a prostitute who managed to leave the streets by getting married. Her husband dies one day, poisoned. Her mother-in-law, who hates her, accuses her of murder.

In a Munich circus, Pierre, who has come to attend the funeral of his father, a famous illusionist, finds love in the arms of the beautiful Hildegarde. But he discovers that Hildegarde has a twin sister, Greta.

Vallois, a vice inspector for the Paris police, takes special interest in the plight of drug-addicted Lucky (Najda Tiller), whom he considers to be more victim than criminal. Taking it upon himself to wean Lucky away from narcotics, Vallois also wins her love -- and, incidentally, smashes the dope ring responsible for her addiction.

After resolving to start a new life with his girlfriend Jacqueline, Bastien Sassey decides to give up working as a courier for drugs traffickers. So that he and Jacqueline can make a fresh start he agrees to take on one more job for a large sum of cash, but he betrays his employer.