A new super weapon has emerged and Gamilas ships vanish from the seas. In the meantime, the Yamato has left the Large Magellanic Cloud and is on its way back to the Milky Way Galaxy. During the voyage, the crew is hit by a gatlantean warrior fleet under command of
Goran Dagam, who claims the “Yamatee” as his prey. After
Susumu Kodai in command refuses to give up the ship, the Yamato makes a run and accidentally ends up inside a strange world that defies logic and the law of physics. An expedition team is sent to the surface and makes a truly mind-boggling experience that they cannot escape. Next to that the team doesn’t seem to be alone after they encounter their old foes. Time runs out and the Gamilas and Terrons walk a thin line in a world that’s not their own, having the Gatlanteans sitting in their necks.
2199 AD. Yamato tried to leave behind the Large Magellanic Cloud galaxy, after receiving a “Cosmo Reverse System” at its destination, Iscandar. However, suddenly, it encounters a mysterious group at the edge of the Large Magellanic Cloud. The crew finds out that the group is called the “Gatlantis,” and that its leader is the Gutaba expeditionary force commander who calls himself “Goran Dagaamu of Thunder.” The commander demands that Yamato be handed over to him. Yamato, wanting to hurry to Earth, escapes the fray. However, Yamato is attacked by a devastating beam weapon called the “Flame Direct Attack Cannon” that can transcend space.
Yamato was able to retreat, but ends up getting lost, and finds itself in a strangely colored irregular dimension. The crew decides to turn off the engine on the ship, and explore a mysterious planet. In order to collect information, Kodai, Kiryū, Sawamura, Niimi, and Aihara land on the planet. What they saw when they arrived was a ship that was not supposed to be there.
Dagaamu chases after the traces of Yamato’s warp, and also reaches the strangely colored space. The planet on which Yamato landed was in fact what Dagaamu had been looking for all along.