When miners blast for gold in the 1870's, they accidentally release ancient creatures known as Tommyknockers. The Town of Deer Creek, Nevada is soon under siege with only a handful of survivors held up in the local saloon.
一名代号 13 的杀手在一次任务中险些失手,之后她被自己所属的组织“阴影”所停职。在一段时间后,这位杀手遇到了Monji,一个不幸失去母亲的小男孩。在Monji意外失踪后这位杀手开始了寻找Monji的路途,她甚至不惜对抗她所属的组织。