At a trading post in the northwest, Mary Hall lives with her father and crippled brother, Billie. Jules Du Boise, a French Canadian, is in love with Mary, but she despises him. When she refuses to marry him he takes her in his arms and kisses her. She is struggling to free herself when her father enters, and the intruder is thrown bodily out. Jules vows vengeance. Hall receives a message from the president of the trading post asking him to meet him at another post. He leaves, first telling Mary that a shipment of coin will be in that afternoon to pay off the men at noon on the following day. From the woods Jules sees the money-laden canoe going up the river and decides to rob the Hall store that night. When the money arrives Mary realizes her father has forgotten to give her the combination of the safe, but she and the men believe the money will be all right as long as they lock the door. Jules sees and overhears all this from the window. After Mary and Billie have retired, Jules climbs through the window and begins collecting the money. Mary, hearing a noise, goes into another room in time to catch Jules in the act, but he has heard her coming and, covering her with a gun, makes his getaway in a canoe. Mary and Billie dress quickly and follow. Some hours later, Jules, thinking he is practically free from pursuit for the time being, decides to take a rest, so that when he pushes off again at sunrise, he is surprised on looking back, to see Mary and Billie, who have been paddling all night and gaining on him. He starts a spurt, but Mary raises her rifle and shoots the paddle out of his hand, which renders his canoe helpless. Jules at once jumps into the water and pushes the canoe to shore. Landing, he takes his rifle and money from the canoe and starts off into the woods, followed by Mary and Billie. A shot from Mary goes through the thin part of the stock of Jules' rifle, breaking it off short. His gun useless, Jules takes a chance, and dodging from tree to tree, tries to get away, Mary and Billie following. Suddenly Mary trips over a twig and falls headlong. She tries to get her feet again, but falls; she has sprained her ankle. Billie then picks up the rifle and starts after Jules. Jules has rounded the corner of a rock and sees Billie coming. He hides, and as Billie goes past him, springs onto him from behind and they wrestle for possession of the rifle. In the struggle they get up on a huge rock, which looks down on the river forty feet below. Meanwhile, Mary seeing her brother's danger, is crawling on her hands and knees, nearer and nearer. Presently a canoe rounds a turn in the river, paddled by Hall. He runs his canoe ashore and starts up, recognizing Bill as he comes. Just as he reaches the top of the rock, Jules tears Billie's hands from him, grabs him and throws him into the water below. Pushing Jules aside, Hall jumps off the rock to save Billie. Jules looks down and sees Hall. He picks up the rifle which Billie dropped and, pointing it at Hall, takes aim. Mary draws her revolver and shoots. Jules drops dead. Mary crawls to the edge, and sees her father saving Billie. Hall and Billie carry Mary back to the canoe. The money is recovered and all ends well.