In the tenement slums of Paris between the world wars, impoverished street singer Albert yearns for beautiful Romanian immigrant Pola. Pola's boyfriend, local hoodlum Fred, grows jealous of Albert's constant attention to his woman and frames the hapless musician for one of his own petty crimes. But while Albert is in prison for Fred's misdeed, Pola ends up falling for Albert's faithful best friend, Louis.
In Paris, a stage-struck would-be actor is mistaken for an escaped convict.
A banker threatened by gangsters is replaced by a tramp who is his perfect double. The gangsters arrest the fake banker and take him for a madman.
