在她生日那天遭受可怕的创伤后，艾玛选择不再庆祝一次。但是当她21岁时，她的一个朋友用一个惊喜的聚会打破了这个仪式，不知道醒来的恐怖，这些恐怖已经在黑暗中等待了多年。

After a failed marriage, Richard is in search of his daughter Mindy. He meets Sasha, an aspiring actress who promises to help him. But the hope to get some quick cash by performing in a 24 hours play soon turns out to be a bloody game.

主人公爱玛在她10岁生日那天遭受可怕的创伤，从此她决定不再庆祝生日。这天是爱玛21岁生日，闺蜜艾丽欣坚持要为她举办一个惊喜的派对，此举令爱玛感到异常恐惧。。。