Inside the Mist

is episode 100 of the Naruto: Shippūden anime.

Synopsis
Guren is rendered unconscious, and begins to relive her past as Naruto is caught in an illusion about Sasuke. After Kakashi finds him, Team Kakashi and Team Kurenai conclude the mist around them cause genjutsu courtesy of the Three-Tails. Yūkimaru suffers another fever and passes out. Tsunade hears of the Three-Tails, and assembles Shizune, Ino, Tenten and Lee to go and seal it before the Akatsuki does. Naruto heads off to find Yūkimaru.

Credits
Dentro de la Niebla