Psychologist Margaret Matheson and her assistant study paranormal activity, which leads them to investigate a world-renowned psychic who has resurfaced years after his toughest critic mysteriously passed away.

Dr. Margaret Matheson and her partner, Tom Buckley are the world's foremost investigators of paranormal phenomena. Professional skeptics, they have debunked dozens of fraudulent mind readers, ghost hunters, faith healers and the like by detecting what Matheson calls 'red lights', subtle clues to the trickery behind each of these 'supernatural' occurrences.