Iraq, 2003. As the conflict draws to a close a Military Unit, accompanied by CIA field operative Rachel King, is ordered to investigate a suspected underground chemical weapons facility in shadow of the Zagros Mountains.
Arriving at the coordinates, the search party is ambushed by a local patrol led by Sergeant Salim Othman.
During the battle, an earth tremor opens sinkholes in the ground, pitching both sides into the ruins of a buried Sumerian temple and, in the darkness beneath the Arabian Desert, something evil is awakened. Savage and unstoppable, a nest of ancient and unearthly creatures have a new prey to hunt.
Horrific discoveries and impossible decisions face the Unit as they strive to navigate a subterranean labyrinth and escape the terrifying threat.