Three years have passed since the battle with the White Comet Empire. President Dessler, who has been searching for a new mother star to save the dying Gamilas people, finds a star that meets the conditions in a section of the Milky Way galaxy. But it was within the territory of a mighty interstellar nation. The territorial dispute that broke out in the galaxy inevitably involves the Earth, which has a security treaty with Gamilas. The magic of the time fault, which brought military and economic advantages to the earth, has disappeared in exchange for their own lives. Susumu Kodai sets out on a training voyage with the new crew in preparation for an upcoming emergency. Without knowing that someone who is aiming for himself is in the middle. Yamato is about to embark on a new journey in an era of unprecedented anxiety. On the way, an unimaginable new enemy awaits …