Everyone has returned to the Hidden Leaf Village. Kakashi is hospitalized for a week due to the strain caused by his Mangekyo Sharingan.
After attacking Naruto, Sai predicts that they will meet again soon, then vanishes. Tsunade meets with the village elders, Homura and Koharu…
Naruto is enraged when he discovers that Sai attacked him in order to test his strength. Sakura pulls them apart, but tensions are running high between the members of Team Kakashi.
The new Team Kakashi heads for Tenchikyo. To Naruto, Sai is just temporarily filling in for Sasuke. When Sai shows his contempt for Sasuke, the antagonism comes to a head.
Sakura comes across Sai working on an abstract painting. He tells her that he's unable to give it a title. Bothered by his manner, Sakura finds an unusual picture book among Sai's things.
In preparation for Tenchikyo, Yamato conducts a half-day simulation in order to get a grasp on the fighting skills and jutsu of Team Kakashi. Sai abandons Naruto to conclude the simulated mission successfully.
The day for capturing the spy is finally here. Just as planned, Yamato takes on Sasori's likeness and waits until the Akatsuki spy appears. The spy turns out to be none other than Kabuto.
Faced with Orochimaru, his sworn enemy, Naruto suddenly releases the power of his Nine-Tailed Fox. When Yamato sees Naruto's fourth tail appear, he recalls Jiraiya's tale of how he nearly lost his life to the transformed Naruto.
When his third tail appears, all that Naruto can see is Orochimaru. He is blind even to his teammates.
With the release of his fourth tail, Naruto completely loses his awareness and is overtaken by destructive impulses.
Although he has changed almost completely into his animal form and has lost all awareness, Naruto refuses to give up the idea of bringing Sasuke home.
Taking advantage of the confusion, Sai makes contact with Orochimaru. After reviewing the contents of the documents given to him, Orochimaru decides to take Sai back to the hideout.
Naruto and Sakura are shocked when they hear that Danzo's goal is to work with Orochimaru to once again attempt to defeat the Leaf Village.
Naruto is shocked to learn that he was the one responsible for the destruction around them and for Sakura's injuries.
Sai shudders when he finally meets Sasuke face to face in Orochimaru's hideout. The list that Sai gave to Orochimaru lists the members of the Anbu Black Ops, the corps under the direct control of the Hokage.
Team Kakashi is able to find Sai with Yamato guiding them. They immediately begin questioning Sai about Danzo's plans for destroying the Leaf Village, and surprisingly, Sai divulges everything.
Kabuto carries out a surprise attack on Team Kakashi to take back Sai, but a change has come over Sai since Sakura pointed out his contradictions.
Naruto, while nursing his injuries caused by the release of the Nine-Tailed Fox, searches frantically for Sasuke. Seeing this, Sai recalls the feelings he once had for his older brother and finally manages to complete his unfinished picture.
Team Kakashi are stunned to learn that Sai's true mission is to kill Sasuke. Naruto wants to believe that the smile Sai showed them was real, but there is a possibility that it was all an act.
Team Kakashi finally have their wish to be reunited with Sasuke granted. Although it has been three long years, Sasuke's feelings have not changed. His ultimate goal is to get revenge against his older brother, Itachi.
Sasuke's desire for revenge remains firm, no matter how hard Naruto tries to talk him out of it. Yamato tries to take Sasuke by force, but interference by Orochimaru brings things to a quick close.