An alien scout lands on earth in the year 1854. The creature is searching for water and food. Once it finds what it needs, it will call in an invasion fleet. A lone cowboy must stand against the alien invader or all will be lost. 在1854年,一架外星人的侦察机降落在地球,这个外星生物在寻找食物和水,一旦让它发现了这些他们所需要的东西,它就会立刻通知其它外星舰队入侵地球。一个孤独的牛仔不得不站起来反抗外星侵略者,不然他会失去所拥有的.....