Bobby, the doughboy, has left his sweetheart behind in Paris. He returns for her and has the greatest difficulty locating her. In his hunt he runs into the tough White Rat Cafe, where the Darling of Paris becomes enamored of him, thereby arousing the jealousy of her lover, who threatens Bobby with dire consequences. Bobby escapes, runs into his sweetheart, and in the chase, the villain at his heels is captured by the police as a badly wanted criminal.