When brilliant college professor Miranda Hollander suffers a mysterious blackout, and awakens amid the bloody aftermath of a mass slaughter, she turns to her uncle for answers. But when he reveals the shocking truth... that she's only half human, a clone from a hybrid of human and alien DNA, they must flee to Mexico to locate the scientist who created her. Soon they find themselves locked in battle with a horde of rampaging, unstoppable hybrids... and time is running out before Miranda will inevitably surrender to the killer instinct that lurks inside her own body!