A likable old inventor and former stage hypnotist, Karloff has finally developed a device whereby one person can totally control the mental facilities of another. All he needs to find is a person willing to act as a guinea pig, and Ogilvy fits the bill. Karloff's intentions are good, but
his wife, Lacey, has developed a cynically selfish attitude after years of poverty spent helping in her husband's experiments. When she sees the newly attained power at her disposal, which includes feeling the sensations of Ogilvy as he undertakes their commands, Lacey's desires become more
sadistic and self-gratifying. This is a total reversal of Karloff's intentions, but he can d...