A band of mercenaries led by Jack Frost and his best friend Nat McKenzie, travel the world taking on assignments too dirty for the U.S. government. While wrapping up their latest mission, Nat gets bitten by something the locals refer to as the "Vampire Demon". When Jack finds out that Nat has been killed on a mission, Jack sets out to avenge his friends death only to find that Nat isn't dead, he's become a vampire! The former friends face each other in a final confrontation that pits two trained killers against each other.