Aristocrat Riderstone Hunster returns to England after vanishing for five years in Thailand. Having become a Buddhist monk, he has kicked his drug habit and honed phenomenal psychic powers possessed since childhood. He comes across a tormented young ghost terrorising an old house on the south coast and soon realises this spirit child is seeking revenge for a terrible crime. Riderstone tries to help but knows any possible witnesses to the crime are probably dead. The only information he has are sketchy clues from beyond the grave. Aided by ex-private detective Dermot O'Branagh, Riderstone begins a baffling psychic investigation where the vague clues of a six-year-old spirit are all they have to go on. But an old lady who once lived at the house appears to know more than she admits. Her evasiveness, and the spirit's persistent visitations, keep them guessing about the deceased's real identity until a final confrontation on a dark sea-sprayed pier.