Mary Thorne, a quarter-breed Native American, returns home from the East with a college degree and an air of refinement, although she relishes the freedom of her father Marshall's mountain cabin. When Mark Hamilton and Chester Martin visit the cabin on a hunting expedition, Mary, in a spirit of mischief, dons her Indian clothing and convinces them that she is full-blooded. Mark falls deeply in love with the girl, while Chester, contemptuous of her Indian background, though attracted to her, decides to possess her. While her father is hunting for gold at Lost Lake, Chester enters Mary's room and attacks her. Mark rescues her, after which he realizes, by the modern décor of her room, that Mary is a cultured young lady. Later, Marshall is killed by an Indian guard at Lost Lake, but Mary inherits the gold he discovered and marries Mark.