For sixty years, Oume Goketsuji led the Gouketsuji clan—until the day her younger sister Otane finally surpassed her and claimed the title. Fuming at her defeat, Oume finds an unexpected ally in Oshima Goketsuji, who arrives in the night and offers the means for revenge. Acting quickly, Oume and Oshima dispatch servants to dispose of Otane while she sleeps; Otane is kidnapped and thrown into the ocean. The following morning, a letter bearing Otane's name arrives—supposedly renouncing her right to lead the clan. With the clan's rules requiring an immediate new tournament whenever leadership changes, every competitor from the last contest and other family members are summoned. The tournament is set to begin.