The citizens of Comet Valley are being taken over by seeds from an alien plant that has taken root there. A sheriff investigates the strange goings-on.

On another planet which resembles the Old West, a die-hard pacifist is forced to re-examine his ways after an evil alien bandit and his gang murder his estranged sheriff father, take over his home town, and threaten his friends.

Bound by hate and a mystical amulet that holds the powers of life and death, two immortal wizards meet for the last time in an ancient struggle of good versus evil.