Jan-Michael Vincent stars in this action thriller about an alien predator on a killing rampage. Deep below the Rocky Mountains lies a top secret U.S. defense facility where scientists research the dangerous transporting of humans to parallel dimensions. Now something has gone terribly wrong; a scientist has returned from an experiment mysteriously "infected." Soon he violently spawns a voraciously hungry alien being capable of regenerating itself over and over through a human host. When computers seal the contaminated facility, everyone inside is trapped... and humanity drops lower on the food chain as a rampaging alien terror threatens to consume them all.