In order to take over the city, corrupt police commander Forrester intends to use a telepathic breed of human, Scanners. To control the Scanners, Forrester enlists the help of evil scientist, Dr Morse, who wants to conduct mind control experiments on the Scanners with a new drug. Unfortunately the side effects render the Scanners incapable, so Forrester finds David Kellum, a good, rational Scanner who, unaware of his own powers, agrees to work with him.