The professor holds captive by hypnotism his daughter, Marjorie, from the time she is a child until she has grown to womanhood. Tarred, feathered and driven out of town, leaving his child to be adopted into the family of Judge White, he returns after many years to reassert his complete mastery over her inner mind. The child obeys him and steals away from the foster parents and they employ a detective to run down the thief. The latter falls in love with the girl. The professor causes his child to become a thief stealing jewels, and finally the two disappear and the detective begins a world-wide search for them. The closing scene occurs In a great New York theater. Marjorie appears on the stage as an Egyptian mystic with a huge snake entwined around her neck. In the midst of the scene the professor drops dead. Her father's death has broken the spell and thus true love and Innocence again secures its just reward.