After a mysterious attack wipes out the major cities of 19th century Japan, Korea, and China, survivors from all three lands find refuge on a hidden island and build a new society. Hana, the orphaned daughter of Korean peasants, and Kenichi, son of a great samurai leader, have little in common except for a mutual disdain for the other.
Though the Island’s shelter provides protection, Hana can no longer watch the slaughter on the mainland and leaves her home with General Sato to save the Shogunates’s civilians. Kenichi reluctantly joins her, with his own motivations for the island’s protection in mind.