In January 1942 US forces engaged an unidentified flying object above Los Angeles. Now almost 70 years later, the alien invaders have returned.

一名漂泊的退役士兵在一名刚刚获释的前囚犯的帮助下变成了地下战士，让他们与腐败的警察和雇佣的杀手对抗，后者向他们和他们关心的所有人开枪。