A group of Delta Force soldiers, accompanied by Russian born Central Intelligence Agency agent Katya Zemanova (Pollyanna McIntosh), are sent to the Belzan forest in Chechnya in search of a rogue American weapons researcher, Dr. Benton Walsh.<ref name="Allmovie"></ref> As they search for Walsh's camp, they are attacked by genetically-altered carnivorous bats.<ref name="Allmovie"/> The survivors attempt to reach helicopter extraction but encounter various challenges, including Chechen rebels.