Kasumi is hired not for gold, but for answers: a mysterious “black shōgun” is harvesting the souls of the damned to forge an immortal ninja army. Upon entering Jigokudani, Kasumi encounters the “Drowned Ones”—former shinobi whose eyes leak ink, whose blades cut shadows instead of flesh, and who regenerate moments after being slain.

A rogue kunoichi must infiltrate a cursed village where the dead walk and shadows bleed, only to discover that the true demon is the forbidden ritual her own clan unleashed.

Teaming up with a cynical ronin who carries a cursed flute (Koji Yamamoto) and a young village priestess who can speak to the trapped dead (Miyu Nanase), Kasumi fights through trap-laid temples, upside-down pagodas, and a forest where the trees weep blood. The truth is harrowing: her own late master, thought killed in the previous film, faked his death and now presides over the village as the black shōgun. He is using a perverted alchemy—blending ninjutsu, jashin ritual, and early firearm powder—to bind fallen warriors into eternal servitude.

The film’s centerpiece is a 12-minute single-take sequence where Kasumi battles through a burning village square, switching between katana, kusarigama, and her signature hidden kunai, all while the resurrected corpses of her former friends attack her.

“Hell has no fury. It has a kunoichi.”