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.
Denied re-entry to the island, and with the combined forces of the Shogun and the bandits closing in, Hana and Kenichi prepare for the battle of their lives.