Wanderer

is episode 144 of the Naruto: Shippuden anime. It starts the Six Tails arc

Synopsis
On a lonely cliff, a young man, a girl, and her servant are being attacked by a group of four ninja. The servant sends word to the Hidden Leaf for aid, and the young man named Utakata and girl named Hotaru leave, while the servant stays behind to fight. Back in the Leaf Village, Tsunade tells Shizune of the Tsuchigumo clan and an elder named En no Gyōja, who developed a forbidden jutsu. The Leaf are to prevent the theft of the jutsu. While Team 7 and Yamato arrive to assist Utakata and Hotaru, Utakata leaves immediately, blowing a bubble and floating away.