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.
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.
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.
