After surviving a sea storm that destroyed his ship, Bumi must engage the efforts of others in the rebuilding of the Utopian Castle. The first help comes from a giant dragon, followed by the initially combative Bob Clan. Even the Voyager Clan, Trinita, also participate in rebuilding life in the Utopian Castle. Precisely one year after the Utopian Castle transforms into a shining home, Bumi is introduced to Nimo, a traveler, who turns out to be a source of conflict in the otherwise peaceful Utopian Castle.