When the last space fleet of the UN forces fight against Gamilas forces near Pluto, a mysterious spaceship make a emergency landing on Mars.

Yamato, the Carrier Strike Group under the command of Domel, the two forces confronting each other in the Rainbow Star Cluster.

Yamato leaves Iscandar for home. They go to Balan to use hyperspace gate network, but the remnants of Gamilas forces ambush there.