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.
With enemies on all sides, Hana and Kenichi struggle to protect the island and themselves. But the Shogun has a more sinister plan brewing, and for anyone to survive this fight, Kenichi will need to rally the island's forces, and Hana will have to prove to those loyal to the Shogun that his way of life is not worth fighting for.