Set in Siberia during World War II, “The Secret War” follows a Russian squad of soldiers as they track an infestation of demonic beasts. We learn that the beasts are the result of a failed cultist ritual that was meant to create demonic minions to fight in the war. The team does find the source of the infestation, but when a bomb in the tunnel fails to destroy it, the team must hold out as long as possible as one messenger is sent back to request Russian planes to bomb the area. The team is lost, but in the end Russian bombers arrive to destroy the demonic lair.