It starts off in Vietnam where John Saxon gets bitten by P.O.W. John Morghen who has been infected with some sort of cannibal virus. A few decades later in Atlanta, Georgia, Saxon wakes up from a nightmare flashback of what actually happened back in 'Nam. Saxon then receives a call from Morghen asking him if he wants to go out for a drink but Saxon refuses remembering the incident in 'Nam. Morghen has turned into a cannibal and is soon on the run after biting into a woman's neck. He barricades himself in a department store and shoots some folks with a shotgun. The cannibal virus spreads and soon Saxon joins veterans Morghen and Tony King along with some others to wreak some havoc.

Yor, an extremely blond prehistoric warrior, comes to question his origins, particularly with regard to a mysterious medallion he wears...