Seventeenth century Japan: A rebellion in the Aizu territory has been brutally crushed, leaving twenty one brave warriors dead and most of the nuns of the local convent slaughtered. Now the surviving nuns have sworn to seek revenge.
Jyûbei's life is in danger! He crosses swords with the leader of his enemies, the nefarious Ashina Dôhaku. But Dôhaku invokes a mysterious ninja art and takes Jyûbei's sword from him! Defeated, Jyûbei finds himself held prisoner with the abducted women of Aizu Domain in the Snow Hell, the dungeon beneath Aizuwakamatsu Castle! What gruesome horrors await beneath the castle? What does destiny hold for Jyûbei?