Naraku and Sango are travelling together to find and fight Inuyasha. Sango is still badly hurt and has difficulty walking.
Inuyasha and company are walking around Taijiya Village. They come upon a cave that Myouga tells them was used to store dead demon remains. Inuyasha tries to enter the cave but is immediately shocked by a magic barrier.
Back to Naraku and Sango, they keeping walking along until Sango falls to her knees, unable to keep going. Naraku offers Sango a Shikon Jewel shard, which she hesitates to take.
Inuyasha keeps trying to get through the cave's magic barrier, until he finally gives up and accepts defeat. He then gets the idea to travel to the nearby castle and see if anyone there knows how to pass the barrier. Everyone is walking through the forest to get to the castle when, all of a sudden...BOOM!
Sango's boomerang almost takes Inuyasha's head off. The boomerang returns to her hands and she announces her intention to kill Inuyasha. Myouga tells Inuyasha that he can't harm Sango, she's a good person. So Sango attacks and Inuyasha is forced to just defend. Miroku tries to suck up Sango's Hiraikotsu, but poisonous insects appear on the scene to stop him. It is then that Inuyasha and company see Naraku looming nearby.
Inuyasha rushes Naraku but is immediately chained by Sango and hurled to the ground. Miroku creeps up on Naraku and the two of them duel. Miroku severs one of Naraku's arms and thinks himself to be victorious. That is, until Naraku's arm hurles itself toward Kagome and siezes her Shikon Jewel shards. Naraku's arm then returns to its own body and Naraku blasts away, telling Sango that he will be at the castle.
Sango tells her cat demon, Kirara, to follow Naraku and make sure he doesn't do anything fishy. Miroku also follows Naraku. Sango then focuses her attention on Inuyasha.
Sango and Inuyasha have a short fight, but Inuyasha emerges victorious and tells Sango that she is badly bleeding. Sango is stunned to hear this and has multiple flashbacks about her little brother.
Meanwhile, Miroku jumps on Kirara's back and the two of them lung toward Naraku. The baboon-clad demon proves to be too powerful though and hurles them both to the ground. In doing so, Naraku reveals part of his true form: a gigantic, dark brown, tentacled monstrosity.
Miroku and Kirara then fight against Naraku to the best of their ability. Inuyasha and company arrive on the scene to help out. (Sango has finally realized that Inuyasha wasn't responsible for any of the village's destruction.) Inuyasha severs Naraku's head, but the demon still moves. Sango yells to Inuyasha that the creature before them is just a puppet and to attack its chest.
Inuyasha slices Naraku's chest and "Naraku" dissipates. Everyone sighs - the real Naraku is somewhere probably far, far away. Miroku walks to where the demon was hovering above and finds a piece of wood with some of Naraku's hair tied around it. Miroku rightly figures that this was the puppet.
We cut to to the Prince's castle. We see that right next to the Prince, there is a piece of wood with some hair tied around it. The piece of wood immediately gets sliced into half. We hear inside the Prince's mind - he is really Naraku under a perfect disguise. The Prince walks into another room and we see his silhouette transform into that of a baboon's.