The Secret of the Battle (戦いの顛末, Tatakai no Tenmatsu) is episode 44 of the Naruto: Shippūden anime.
Sakura tried to heal Naruto, but her medical ninjutsu had little effect on his wounds. In the forest, Orochimaru tried to kill Sai, but it was revealed to be an ink clone. The real Sai emerged from the ground and gave Orochimaru a letter from Danzō. Sai then left with Orochimaru and Kabuto for their hideout, with Yamato's wood clone on their trail. After Naruto had come to his senses, the team travelled to the area that had been the battlefield, where they found and picked up Sai's picture book. At the same time, Yamato inferred that Danzō sought to destroy Konoha with Orochimaru's aid.