Kirinmaru takes the Black Pearl from Moroha and demands that she find Akuru. Sesshomaru, Towa, and Setsuna arrive at the scene and Sesshomaru begins to duel with Kirinmaru. The girls join in the fight, but this rouses Kirinmaru's anger.
Towa, Setsuna, and Moroha are sucked into the Black Pearl and are sent to the border of the afterlife, where Moroha is reunited with Inuyasha and Kagome. Meanwhile, Rin and Jaken search for Towa, whose sword is needed save Sesshomaru.
Zero cuts ties with her younger brother and flees the scene. Towa, Setsuna, and Moroha are left to confront Kirinmaru, but in the face of overwhelming power, they must pay a great price.
Towa, Setsuna, and Moroha continue their search for Bokuseno. Meanwhile, while Sesshomaru and Jaken watch over the sleeping Rin, Jaken recalls the day fourteen years ago when Zero placed a curse on Rin.
The truth behind the night that sealed the fate of Towa, Setsuna, and Moroha's parents is finally revealed. It began four years before Towa and Setsuna were born, the day Hosenki II gave Inuyasha the Black Pearl.
Setsuna and Moroha arrive with a demon in the modern era through the Sacred Tree at Higurashi Shrine. Towa is reunited with Setsuna, but Setsuna has no memories of her and refuses to believe that Towa is her twin sister.
The girls arrive at Mount Musubi to retrieve the Kyuyokon root. The mountain is surrounded by a barrier, which Moroha is able to pass through easily due to her spiritual powers. When she enters, she finds a girl sleeping on the mountain.
Towa decides to return to the feudal era to help Setsuna regain her memories. The trio enter the corridor leading to the feudal era, but within it awaits the spirit of a certain priestess.
Back in the feudal era, Towa and Setsuna take on a job to slay a demon Jakotsumaru, a demon boy who is stealing the bones of humans and animals. They meet up with Moroha, who arrives to claim a bounty for Jakotsumaru's father, Tokotsu.
Towa and Setsuna break free from Konton's trap and defeat him. They meet up with Moroha to finish off Totetsu, but he flees the battle. The girls chase after him but are suddenly attacked and find themselves face to face with Kirinmaru.