After being cleared in an internal investigation, FBI Special Agent Nicole Diaz is reinstated and sent back home to the town of Oro Negro to help solve the bizarre murders of two agents. She's met with disdain by the local Sheriff, a good ol' boy who doesn't believe they are being taken seriously and is insulted they sent a woman. At first, it's thought the killings are random acts committed by smugglers or drug dealers, that is until the resident Tribal Ranger realizes the bodies have been drained of blood and suspects it is something more, but his beliefs are dismissed. Soon after, a mysterious woman and her aide appear during an autopsy and claim responsibility for creating the perfect killing machine. A creature designed specifically for desert warfare to be used by the military. It has escaped and they need help reacquiring it. Unsure who to believe or trust, Nicole assembles a team and they set out to capture the creature.