故事讲述杀手卢卡斯(萨姆·沃辛顿饰)被雇佣，刺杀女子艾拉(奥德娅·拉什饰)，而在紧要关头他开始怜悯女孩，并改变主意加入女孩的复仇计划之中。

Bethany has been kidnapped Avondale's popular kids for a surprise birthday party to celebrate her sweet sixteen. They don't realise that Bethany is the target of the monstrous 'Thorn', and nothing will stand in his way.