Aztec myth says the gods created four worlds or "suns" that were each destroyed. With the destruction of the fourth world the god Nanahuatzin in an act of self-sacrifice caused a fifth sun to rise and humans to be created. Now is the time for the Sixth sun to rise. Baron La Croix has gathered a posse together to stop the attacks on his railroad by ancient Aztec warriors. The posse travels into Mexico to deal with the hated Gen. Santa Anna.