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.

An eight-year-old girl goes missing and her distraught parents make an emotional televised appeal. The next day, when Alison says she has seen the child's ghost in the supermarket, the police are deeply suspicious - then they discover a drowned body.