In the act of robbing a set of rare jewels from a museum, a robber is wounded in the hand. Prentice Tiller, while dressing a wound in his hand, overhears the woman in the next hotel room, Gertrude Temple, telephoning Aaron Molitor, to whom she is to deliver some jewels. Posing as Molitor, Prentice calls on Gertrude but disappears when Molitor, who also has been wounded in the hand, suddenly arrives. Molitor's men capture Prentice, who narrowly escapes death in the ruins of an old church and then continues to track Molitor. Gertrude accompanies Molitor and her uncle, Simon Temple, to Paris, where they are met by master crook Chevat and the woman who loves him, Lola Montez. Lola becomes jealous of Gertrude and tries to kill her, but Prentice rescues her. Through a ruse, Prentice, who finally is revealed as a detective, captures Chevat and his gang, returns the jewels to their rightful owner and then proposes to Gertrude.