Naruto Volume 31

"Episodes 125 - 129. The Leaf genin have just about exhausted their strength against the Sound Four when a trio of unlikely allies arrives--the Sand siblings! Meanwhile, Naruto finally catches up to Sasuke--but he's not the Sasuke of old. Now covered in curse marks and determined to go to Orochimaru, Sasuke reflects on his childhood and the brother he wants to both emulate and destroy. Is Naruto prepared to break the unshakeable resolve of this new Sasuke?"