The film begins with shadowy images on a wall showing a man being attacked by what appears to be a woman. He produces a needle from his pocket and administers its contents to his assailant. She falls to the ground, apparently dead. Apparently having no need of more glandular material or another brain, Cheela returns to human form. She is at first unable to speak and Fletcher diagnoses her condition as being due to shock. However, upon the arrival of his daughter Joan (Lois Collier) and her fiancée Bob Whitney (Richard Davies), the girl suddenly becomes verbal identifying herself as Paula.