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. 　　十幾歲的瓊，當她工作狂的爸爸給她買了一只可愛的寵物猴子時，她得到了比她預想的更多的東西，這只猴子長著翅膀、尖牙，在夜幕降臨時，她對血的渴求永不滿足。