After his precocious behavior has gotten him bounced out of one more in a string of exclusive private schools, 16-year old Sebastian Valmont has arrived in New York City to live with his father and stepmother. The cunning and handsome Sebastian may have met his match, however in his equally manipulative and beautiful stepsister Kathryn Merteuil.

父亲弗雷德和母亲德洛丽丝是怪物猎人，家庭闹剧自然异常可怕。而双胞胎阿薇和杰夫也隐藏着他们自己的奇怪秘密。

After she delivers her child in an ambulance, alien Eve is killed by a half-breed. Fortunately, Dr. Abbot scoops up the baby alien and escapes. In time, the baby grows into a gorgeous blonde named Sara and begins her quest to find a worthy mate. But Sara is also savage and leaves a trail of deaths in her wake. This carnage makes chemistry student Dean question whether to help her race or not.