Set in a five-story guesthouse in the middle of a Parisian working class neighbourhood, "Daybreak" opens on the top floor of the building with shouts and a gunshot. A door opens and the body of a man tumbles down the stairs. As the police start to besiege the building and a crowd gathers, the killer, Francois (Jean Gabin), flees the crime scene and locks himself in his room. After failing to shoot their way into his room the police climb on top of the roof, and Francois, starts to recall previous events... His love for Frangoise (Jacqueline Laurent), the beautiful florist, and her love for Valentin (Jules Berry), the attractive dog trainer. Also starring the renowned Arletty as Clara, Valentin's assistant and suggested lover.