Mason, a dragon warrior from the future, returns to the year 1999 in search of a serum that can combat a disease simply known as "The Plague." In the post-apocalyptic world of 2099 -- after an earthquake has destroyed all of civilization has been -- "The Plague" is the deadliest menace of them all. And the cure for it lies in the past!

Some punks go into a small town and start hassling the gas station owner; Billy Ray Dalton a friend of the owner pulls a shot gun on them and tells them to go away. Later they go back and force the owner to tell them where Dalton lives. Now, Dalton a part time musician's out on a gig, when they go to his house and kill his pregnant wife, and take his daughter. Dalton follows them to try and get his daughter back.

In the Los Angeles of the future, police are forbidden to carry weapons and must use stun guns instead. A maverick detective ignores those restrictions in his pursuit of "The Bullseye Murderer," a psychotic rapist who takes a new drug called "Umbra" that gives him superhuman strength and intelligence.