Synopsis: Yamato, Naruto Uzumaki, Sakura Haruno, and Sai are assigned on a mission to capture Mukade, a missing-nin. They all have chakra-knives, which are uniquely designed trench knives that allow a ninja to infuse their chakra with it to produce an added effect. They set out for the once glorious historic ruins of Rouran, a city with one thousand towers and is located in the middle of the desert. They pursue and corner the missing-nin. Mukade's goal is revealed to travel to the past and take over the Five Great Shinobi Countries with the power of the Ryūmyaku, an ancient chakra flow deep underground Rouran. He unleashes the power of the Ryūmyaku, which is seen to have been sealed by Minato Namikaze (who was well known as Konoha's Yellow Flash), causing a light to envelop Naruto and Yamato, who was trying to stop Mukade. Sai stops Sakura from getting sucked in by the Ryūmyaku by grabbing her onto his ink bird and flies to safety, leaving Naruto and Yamato in the mysterious light. Naruto and Yamato are sent twenty years into the past.