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Keiichi and Rena suspect that Rika and Satoko went to Mion's house the night of their disappearance. On their way to the Sonozaki residence, Officer Oishi tries to use Keiichi as bait to bring Mion out, as he also suspects her. Mion admits to the murders, and tells Keiichi and Rena about her demonic lineage and heiress status. She takes Keiichi to an underground dungeon where Shion is imprisoned; the sight of them together sends her back into a rage, and she knocks Keiichi out and prepares to perform the ancient intestine-devouring ritual of Watanagashi on him. The police break into the Sonozaki grounds and rescue Keiichi and Shion, while Mion escapes. In the well, they find the bodies of Rika and Satoko... and Mion Sonozaki. Shion later commits suicide by falling from her hospital balcony. As Keiichi prepares to move out of the village, the so-called Mion appears again to stab and torture him...