The war between the Earth and the Crest had ended, and they began to retrieve peaceful lives. However, another menace was approaching. It was automatic weapons that attack both the Earth and the Crest. A patrol ship, Tetraskelion, received a rescue signal from the Crest ship, and they went to rescue. However, they were attacked by the ship operated by automated weapons. The crews of Tetraskelion, Galory, Nikolai and Althea, entered the ship to destroy automatons.