Beautiful young manicurist Carole suffers from androphobia (the pathological fear of interaction with men). When her sister and roommate, Helen, leaves their London flat to go on an Italian holiday with her married boyfriend, Carole withdraws into her apartment. She begins to experience frightful hallucinations, her fear gradually mutating into madness.
A struggling actress tries to help a friend prove his innocence when he's accused of murdering the husband of a high-society entertainer.
A team consisting of a physicist, his wife, a young female psychic, and the only survivor of the previous visit are sent to the notorious Hell House to prove or disprove survival after death. Previous visitors have either been killed or gone mad, and it is up to the team to survive a full week in isolation, and solve the mystery of the Hell House.
