When a handful of friends stumble upon the abandoned building, they come face to face with a biological weapons experiment gone catastrophically wrong. They also confront a maniacal scientist who predicts life on Earth will end in 48 hours if the accelerated bacterial mutation cannot be halted. As the virulent, flesh-hungry contagion spreads from person to person, rendering each host into a pile of infectious ooze, it begins to multiply and increase in size. A covert military force sent in to contain the spread and destroy the organism discovers the extent of the slithering mutation, but by then it`s far too late for conventional tactics. Extreme measures are required if anyone is left standing in one solid piece to do battle.