A scientist discovers a death ray and locks it in a box, giving the key to his daughter, who soon finds herself hunted by criminals looking to steal the deadly mineral.
John Glayde is a stone-hearted man intent on wealth to elevate his family, losing his wife to another man in the process.
Claire Martin, niece of the wealthy Mrs. Taylor, suffers from loss of memory. Under the effect of this, Claire acts as an entirely different person. She wanders through the woods seeking shelter and food, and finally reaches a cabin temporarily occupied by a New York sportsman, who is fishing and hunting in the woods.
