Elizabeth Bradley wakes to find herself naked and tied to an unfamiliar bed, surrounded by darkness. She soon realizes she's not alone. A man sits nearby, and although she can't see him, she recognizes his voice. He is the much-respected Dr. Caspar Wilderman, senior psychiatrist, and he wants her to be afraid. Elizabeth is a psychiatric nurse at the hospital where the doctor works, and he has kidnapped her with clear intentions. In the darkness, he kindly explains he needs her for an experiment-their experiment. Elizabeth makes for an interesting subject: virginal and abstaining from drugs or alcohol. She's also brilliant. Wilderman, possibly mad, has chosen Elizabeth to help prove the existence of the Stockholm Syndrome, in which kidnapped victims become enamored with their captors. Theirs is a battle of wits as Elizabeth uses her medical training to play his little game while retaining her virtue. Who will emerge from the naked darkness victorious and step into the light?