Jennifer Carpenter, Kristen Connolly and Alexander Poe star in a comedy about three New Yorkers struggling to uncover the truth behind their romantic entanglements. Disheartened by his latest relationship catastrophe, Graham (Poe) attempts to rekindle the spark with his ex-girlfriend, Laura (Connolly). In the attempt to win her back Graham discovers he has a unique problem: Laura and another one his ex-girlfriends (Carpenter) are dating the same guy.

故事讲述的是一群纽约剧院演员，来到荒郊野外的月亮湖营地，准备过上一段修身养性、发现自我的日子。却不想，此处乃邪恶之地，由月亮的潮汐运动的作用在此聚集成强大的力量，从而引起人类头脑的变异，人们会变得疯狂、甚至于完全失控！而这13个成员中就有一个已经被邪恶的月亮所控制，他开始悄悄的在背地里疯狂的杀人，他是谁呢？