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.

C. Thomas Howell
as Chief Grasso

Judd Nelson
as Agent Wilson

Jason London
as Cale

Serah D'Laine
as Carol Milner

Robert Carradine
as Dr. Wexler

Alexander Mendeluk
as Ryan

Andrew Amani
as Infected Worker #1

Brett Beoubay
as Elevator Passenger

Darren Arnaud
as SWAT Guy

Henry Boger
as Police Heli Pilot