Jack Deth (Tim Thomerson) is a police trooper in the year 23rd century who has been hunting down Martin Whistler, a criminal mastermind who uses psychic powers to turn people into mindless "trancers" and carry out his orders. Deth can identify a tranced individual by scanning them with a special bracelet. All trancers appear as normal humans at first, but once triggered, they become savage killers with twisted features.