Set hundreds of years after the original, Yamato 2520 chronicles the adventures of the eighteenth starship to bear the name, and its battle against the Seiren Federation. On a planet harshly ruled by the Serien Federation, a group of Earth teenagers discover the ancient hulk of the Earth Federation Battleship Yamato. By stealing its data disk, the teens are able to use the Serien's own automated shipyards to construct a new Yamato.