A man with dangerous psychic powers is recruited by a sinister corporation to infiltrate and destroy an underground movement led by a fanatical renegade telepath intent on taking over the world. David Cronenberg's sci-fi thriller, starring Stephen Lack, Patrick McGoohan, Michael Ironside and Jennifer O'Neill.

After a man with extraordinary, and frighteningly destructive, telepathic abilities is nabbed by agents from a mysterious rogue corporation, he discovers he is far from the only possessor of such strange powers. Some of the other “scanners” have their minds set on world domination, while others are trying to stop them.