In 1939 a spaceship carrying four alien escaped prisoners crash-lands on Earth and the aliens take over the bodies of four locals. Fifty years later the aliens find out that an artist has written a comic book called "Space Avenger," which they believe is about them. They go to New York to try to kill the artist.

波特是一个曾经吸毒上瘾的警察，他的女朋友瑞秋想要与其一起离开洛杉矶开始新的生活，为此急需一大笔钱。后来瑞秋找到了一个网络A片制作人，打算靠出演A片赚些外快。没想到事到临头，对方竟然将其下药并绑架走了。波特开始了疯狂的搜寻，势必要找到瑞秋为止……