Old inspector McGrath of the Royal Northwest Mounted Police, is proud indeed when his son, Jim, gets his sergeant's stripes, and bids him to live up to the duties they impose, but the mother of Jim's trail-pal, Brock, whom the motherless boy regards as his own, bids Jim remember, "Duty to God first and to the King second." Jim and Brock are rivals for the band of Ellen. She really prefers Jim, but piqued at his lack of perception, encourages Brock. One day she is attacked by a villain, Black. Brock happens along, and during the encounter that ensues, knocks the assailant over the cliff and he is killed. The girl persuades Brock, against his better judgment, to flee, and Jim is detailed to capture him. His inclinations revolt against such pursuit, and Ellen threatens him with her hatred if he does so, but the brand of duty has burned so deeply that nothing can swerve him from orders. He trails and arrests Brock, and, bringing him to quarters, he meets Ellen, who pleads with him for ...
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