In order to protect his village from Deidara’s explosive clay, Gaara uses his chakra to create a giant sand shield.

Guy prepares to use a forbidden secret jutsu. Meanwhile, Naruto falls under Itachi’s genjutsu, and all the anti-genjutsu training he underwent with Jiraiya races through Naruto’s mind.

Naruto loses all reason to anger and is gradually taken over by the Nine-Tailed Fox Spirit. Having been forewarned by Jiraiya, Kakashi narrowly manages to suppress the Nine-Tailed Fox.

Naruto is paired with Sai for the Buddy team of two, over his and Sakura's objections, while Sakura is assigned to support Yamato. Yamato conducts a simulation of the spy meeting with himself as the spy to gauge Naruto and Sai's abilities and teamwork. After Naruto makes a mistake when attacking Yamato, Sai immobilizes him and goes on to capture Yamato alone. Naruto is angry with Sai for not acting as a comrade would, but resolves to work together with him if doing so will help bring Sasuke back. Sai reveals to Sakura that he has no emotions, and little understanding of them. The group then prepares to head to the bridge.

Naruto finally makes sense of the destruction he witnessed around him earlier. Yamato tells Naruto not to rely on the demon because Naruto is strong enough to withstand the demon's terrible chakra. Sai discovers the loss of his book while resting. Team Kakashi browse Sai's book, and they notice that the book (which can be read from both ends) contains different paths of two boys who meet in the middle. Each page has the boys fighting someone new, each time collecting the opponent's armor and weapons into the next page. The pages where the two boys would meet are unfinished. Orochimaru's group reach their base, not realizing that Yamato's wood clone trailed them there. Sai gets a glimpse of Sasuke's silhouette and eyes and discovers that he is the man Naruto and Sakura are looking for.

Naruto's been having nightmares about the release of the Nine-Tail's power. Afterward, Kakashi informs Naruto that he has special training for him that will make him strong quickly. They are cut off by Team 10, who have also come to visit. Sai lunches with them and, trying to make friends by using nicknames, angers Sakura by calling Ino "gorgeous" after concluding that women do not like to hear how they really are.

Hidan falls into Shikamaru's trap, but now that he has Hidan cornered, can he find a way to defeat Hidan's immortality? Elsewhere, things are looking grim for Kakashi, Choji, and Ino as they continue fighting Kakuzu, but a surprise back-up unit arrives on the scene to provide some much needed assistance.

The code Jiraiya left behind is finally deciphered, but what exactly does it mean? Meanwhile, Naruto continues his training.

Ebisu protects Konohamaru from Pain and refuses to divulge any information about Naruto. Ebisu is willing to give up his life in order to protect both Naruto and Konohamaru. Konohamaru isn't about to let his teacher throw his life away, but what can he possibly do against Pain?

Nagato tells Naruto about how he met Yahiko and Konan and later came to be Jiraiya's disciple.