Laura Danvers, a handsome young woman, is the betrothed of Dr. Roy Crawford, a young physician who is practicing in the west. She is also loved by Pierre Rameau, a hypnotist, who places the girl under his influence at will, enjoying the diversion. Doctor Crawford comes for the girl to take her to his home and make her his bride. He leaves the room, forgetting his hat, after being repulsed by Laura, who is under the spell exerted over her by the unprincipled Rameau. He upbraids his sweetheart, whose sudden revulsion of feeling has mystified him. Going out he sees Rameau, through the French window in the act of bringing Laura once more under his influence. It all dawns upon the young physician and he hastily returns and throttles Rameau, threatening to kill him, but Laura interferes. She has regained her senses and Dr. Raymond announces that he has made a study of hypnotism, and not being clear as to the relations between Laura and Rameau, he forces him to enter into a contest to see which possesses the greater power. The two men exert their influence and Laura is attracted to her sweetheart and he takes her in his arms. Bidding her leave the room. Crawford hypnotizes the Frenchman and leaves him writhing in agony,