Manipulated by Naraku, Sango is convinced that Inu yasha is responsible for the massacre of her family, so she goes on to pursue her revenge, aided by a piece of Shikon's pearl that Naraku gave her. She catches them up, while they find a cave that would contain the secret of the pearl. The fight is engaged, Miroku confronts Naraku and Sango, the Hanyo. But the effect of the pearl is fading and Sango collapses while Naraku runs away. Treated by Kagome, the girl understands that she has been duped and reveals to them the origins of the pearl. Friends therefore go back in search of missing pieces of the pearl. On the way, they fall on a procession that brings a child to sacrifice for the god of the water "Suijin"...