She may be beautiful on the outside... but inside, she's carrying a deadly secret! Prepare yourself for the fourth terrifying installment in the legendary Species series, which ratchets up the thrill-factor to the highest possible level of action, horror and mayhem!

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!