The year is 2202. Three years have passed since the space battleship Yamato returned from the grand voyage to Iskandar, which was 168,000 light years one way. The Earth was restored to its former blue state under the "Space Recovery System", and a peace treaty was concluded with the Camillas Empire. While recovering, the preparation of a new fleet for defense, including the latest battleship Andromeda, is also underway. The wish of Stacia of Iskandar has also come to naught, and the Earth has begun to move towards military expansion. Is this really the true peace that Yamato has achieved after the irreplaceable sacrifice of many people? The prayers of Theresa, the goddess who hopes for the peace of the universe, invite Yamato to a new voyage. Now, the threat of Gatlantis, which has swept across the universe, is approaching the Earth.