"Sai's Mission!!" (サイの任務!!, Sai no Ninmu!!) is chapter 297 of the original Naruto manga.
With the Nine-Tailed Demon Fox suppressed, Sakura heals Naruto's injuries. She asks if it is is possible to learn Yamato's Wood Release, hoping to be more helpful to Naruto, but Yamato says it is not. Yamato adds that this doesn't matter given her feelings, but Naruto wakes up before he elaborates. Naruto asks how Sakura became injured and, seeing that Sai is gone, suggests it was him. Meanwhile, Orochimaru, surprised by Sai's claim that he speaks for Danzō, agrees to listen to him. He does, however, insist that Sai speak in person, destroying his ink clone. Sai reaches for his bag but is tackled by Kabuto, believing he is an enemy. Orochimaru finds what Sai was looking for and tells Kabuto to release Sai, as Sai will be coming with them.