When psychology lecturer and psychic mediums specialist Robert Bridge takes his students to a clairvoyance evening, he meets troubled psychic Alison Mundy. Sceptical about her abilities, Robert decides to study Alison and contemplates writing a book about her after sitting in on one of her readings. But he is completely thrown when Alison claims to see the spirit of his dead son Josh.

On the ward of a hospital psychiatric unit, Alison meets Daniel, who is being held after an attack on his girlfriend. He desperately tries to persuade Alison that the man responsible for the assault was the other Daniel - Daniel Two. Doctors are convinced the young man is a pathologically violent schizophrenic, but Alison has serious doubts.