Episode 144 features a new quest which involves a secret treaty made before by the third Hokage with and Lord En No Gyoja of the Tsuchigumo clan. A treaty regarding the classifying and protection of a jutsu created by Lord En No Gyoja. A jutsu powerful enough to wipe out an entire village in a blink of an eye. The third demanded it to be classified as a forbidden jutsu and never to be used, in return Konoha would help safe guard the jutsu and would send aid to the clan in-case needed, but a crisis has occurred a group of ninjas are infiltrating the Tsuchigumo Village and they have bypassed their fort with ease. The care taker and the faithful servant of the deceased Lord immediately sends message to konoha asking for aid. And as our weary main character and his group are about to reach Konoha they are met along the way by Katsuya the faithful summon of Tsunade. They are then instructed to proceed to provide assistance to the Tsuchigumo clan. So Naruto,Sai,Sakura and led by Yamato went their way to provide assistance while Kakashi and the rest where instructed to head back to Konoha to report on their previous mission. To watch the episode just visit this site and for other updates o the series. (narutocentral.com/?p=media/episodes/shippuden/144 )