William MacDonald, an American surveyor, comes to an Ojibway village in the Canadian Northwest. He seduces Annette, a half-breed girl, while her fiancé Baptiste and her half brother Jules Beaubien are away on a trapping expedition. After his work is over, MacDonald spurns Annette and leaves. When she realizes that she is pregnant, Annette wanders delirious into the forest and is devoured by wolves. On returning, Jules persuades Baptiste to let him avenge Annette's death. Jules and Baptiste go to the cabin of Andrew MacTavish, a wretched, self-exiled Scotsman who continually berates his daughter Hilda, whom Jules loves, because her mother left him years earlier. MacDonald arrives and convinces MacTavish that he will take Hilda to his mother in Scotland to educate her, after which they will send for MacTavish. Jules discovers MacDonald's identity when he drunkenly boasts of his previous conquests. Jules fights MacDonald and MacTavish, and escapes with Hilda in a canoe.