Two mysterious strangers arrive uninvited at the wedding of Sergeant O'Farrell of the Royal Mounted Police and Rosine Delorme, the daughter of an innkeeper. After O'Farrell receives a message that Rosine's wayward brother Louis has escaped from prison with the notorious devil-may-care outlaw Rossingnol, O'Farrell postpones the wedding to find the convicts. One of the strangers confronts Rosine alone and convinces her to guide him to a cabin at the end of the Passage Du Mort where, he says, Louis awaits. When they find the cabin empty, the stranger reveals himself to be Rossingnol. They struggle and Rosine faints. Rossingnol carries her to a bed and hypnotizes her, but just then Louis arrives wounded to warn that the mounted police are coming. Rossingnol tells Louis to take Rosine and hide in the bushes until they hear a shot to signal them to head for the border.