A helicopter crashes in the desert, and the crew winds up in the underground city of Atlantis and get mixed up in a slave revolt.。An elite team of mercenaries is hired for a covert operation, deep inside a former Soviet state. Arriving at an underground laboratory, their mission is to secure specimens of genetically engineered human and alien hybrids. Battling with a ferocious armed militia as well as dark, menacing creatures, the odds of survival are stacked against them.。