Denis, a poor student in philosophy, works as a night porter in the Paris market of Les Halles in order to pay for his studies. Constantly weary, he falls asleep and dreams of a beautiful girl in white, Irène, with whom he falls in love.
Noël is a bachelor who inherits a matrimonial agency. After contemplating selling it, he chooses to manage it.
Fedora swears to avenge the death of her fiancé, Prince Yarischkine, killed by Ipanoff who fled to Paris. She finds Ipanoff whom she falls in love with and he confesses to having killed her fiancé because Yarischkine was his wife's lover. But learning that her brother was executed because of Fedora, Ipanoff leaves her. Fedora commits suicide.
