Louis, Count de Tavannes, and his companion, Dimitri, lead a gay life in Paris. On the return trip of a motor tour, they stop at an inn and discover Rosette, the daughter of the innkeeper, who dances for the guests, not from choice, but necessity. Dimitri suggests they take her to Paris. The patrons of the inn, jealous of the fashionably-attired young men and the attention paid them, raise a riot. During the uproar Rosette is taken to the motor and to Paris, where she goes to a hotel with Louis, her favorite of the two young men. During their breakfast the next morning, she learns from Louis' lips that he will not marry her. Remy, the faithful servant of the inn, has sought her out, grasps the situation, strikes Louis in the face and a fight ensues between the two men. Louis is discovered, bleeding and unconscious, and taken to the home of a young priest. Through the influence of the good men whom he has thus accidentally met, he enters the priesthood. Rosette secures a position as dancer in a café of the underworld in Paris, patronized by the rough element, and occasionally by the wealthy class in search of excitement. Dimitri is at this café, trying to induce Rosette to drink and dance, as Father Louis enters in search of a man whose wife is ill. The recognition is mutual, and none is so surprised as Dimitri. The latter plans an elaborate supper for himself and Rosette, and Louis interrupts them. As Louis uses his good influence for the girl, Dimitri is exerting a conflicting power, and Rosette bids them fight it out, "for God and my soul, or the devil and my body." With only their hands for weapons, the men go to battle, Louis with a righteous determination to win, and he does. He takes the girl to a convent, where she realizes her great love for Louis and a desire to live a pure life. Father Louis has won the love of the patrons of the café, and when the war is on and France calls for her men, he with his followers tries to defend the convent where Sister Rose Marie is. Mortally wounded, Sister Rose Marie falls across the dead body of the man she loves, and they are united in spirit, although their lives have been sacrificed in an attempt to save other souls, endeared to them.