Against the backdrop of the fierce battles of the Boshin War, a group of samurai and criminals find themselves involved in a desperate defense of a fortress. Their fates are intertwined with the interests of the Shibata clan, the Tokugawa shogunate, and the new government army led by Satsuma and Toshio. Doomed to die, these warriors enter their final battle, where honor, betrayal, and the struggle for survival weave together into a single tragic story.