When terrorist action releases a secret government virus in the Houston Federal building, the employees become aggressive and homicidal. Federal officials quarantine the building to wipe out the infected and control the story, but a small group of uninfected are fighting to get out.

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.