While attending Stanford University, Silent Duval, a half-breed Indian, is both a football star and the object of scorn by his fellow students--except Mary MacDonald. Duval leaves college in disgust and returns to his Northland home as a secret agent for MacDonald's business firm. Later, Duval learns that Mary has been lost in a violent snowstorm while searching for her father, and he defies death to repay her kindness by rescuing her and teaching her father's enemy, Winston Sassoon, a lesson in the law of the Yukon. Duval rewards the patience of Nadine Picard, also a half-breed, with his love.