In this Japanese action film, a samurai-ruled world that appears honorable is actually one driven by fear. A young woman is raped and then kills herself, and it falls to her sister and a female ninja/nun to avenge her pain and death.
In Japan, during the reign of Shogun Yoshimune, it is the era of the samurai and the ninja. Many villages are outwardly peaceful, but a twisted sexual underbelly exists that affects more than just the criminals. Kaede and her sister are unfortunately victims of this when the elder is raped and commits suicide shortly thereafter. Kaede seeks vengeance, and a lady ninja nun who hears of the events aids her in the search. There is more to the story behind the rape however, and the lies and secrets are slowly revealed behind a trail of clothing, sweat, and blood.