Mysterious scars on his body lead Frank Sears to the terrifying truth behind a top-secret Cold War biological experiment. Buried deep below a derelict Army base, the organism is awakened and unleashed on an unsuspecting world, absorbing light and energy, feeding on the living and growing at an unstoppable rate. Sears and Army hazmat specialist Carrie Freeborn only have a few hours to unlock the entity's genetic code before mankind is extinguished.