克林伍德夫妇（Monica Potter Tony Goldwyn 饰）携女儿玛丽驱车来到湖畔别墅度假，刚抵达不久，玛丽（Sara Paxton 饰）便开车去找朋友佩姬（Martha MacIsaac 饰）玩。期间她们邂逅碰巧路过此地的青年贾斯汀（Spencer Treat Clark 饰），在男孩的邀请下，玛丽和佩姬一同前往贾斯汀所在的旅馆。 在旅馆中，她们遇见贾斯汀的父亲克鲁克（Garret Dillahunt 饰）。克鲁克是一个变态杀人犯，他刚刚被弟弟法兰西（Aaron Paul 饰）和女友莎蒂（Riki Lindhome 饰）从监狱救出。为避免泄漏行踪，他们劫持了玛丽和佩姬开车跑路。途中玛丽试图逃跑，由此引发了一连串的血腥事件…… 本片荣获2009年布鲁塞尔国际奇幻电影节最佳导演奖。
After the parties, jobs, and hook-ups well into their thirties, eight friends are trying to hold on to their group as they learn that while growing up is hard, staying close is harder.
Dragonfly is about unlikely friendships. Seeing a lack of care, COLLEEN decides to care for ELSIE. Never sure of her motivations, Dragonfly is a chillingly tense narrative that will make you question your preconceived judgements.
