Earth's Last Citadel

During World War II, four bitter enemies are pulled forward a billion years in time by a master being from an alien galaxy. They arrive on a dying Earth—to Carcasilla, Earth's last citadel—where the mutated remnants of humanity are making their final stand against the monstrous creations of a fading world. Thrust in the middle of this desperate struggle for survival, the last humans must put aside their differences and stop the looming Armageddon.