The story concerns the adventures of Mary Livingston, who is deeply in love with Richard Mallaby, a gambler. Through a misunderstanding, she thinks she has been deserted by her lover when he goes west and leaves her and her baby in the east, to fight out the questions of life in their own unaided way. Disconsolate, heartbroken, she drifts westward herself, and meets Watt Tabor in a rough frontier village. To provide for her child, she is forced into theft, but is detected. Tabor, who knows her history, shoulders the blame himself and marries her. She despises him because she thinks he married her as the result of a whim, and not as the result of real love. Then she meets again the man who first wronged her. Mallaby demands that Tabor give up the woman. Tabor refuses. His decision results in a battle between the two. In the darkness and surging water of a mine, they wage their last fight. Mallaby loses consciousness, but Tabor rescues him, and leaves Mary free to make her choice.