Sally Nicholl

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/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.

After a serial killer strangles several women with a necktie, London police identify a suspect—but he claims vehemently to be the wrong man.