Teenager, Joan gets more than she bargained for when her workaholic dad buys her a cute pet monkey who grows wings, fangs, and an insatiable thirst for blood come nightfall. 十几岁的琼，当她工作狂的爸爸给她买了一只可爱的宠物猴子时，她得到了比她预想的更多的东西，这只猴子长着翅膀、尖牙，在夜幕降临时，她对血的渴求永不满足。