The Lost Tower
Naruto Shippuden Movie 4: The Lost Tower is the seventh overall movie in the Naruto film series and the fourth overall for the Shippuden part. This movie is infamous for the appearance of Minato Namikaze, or the Fourth Hokage.
Team Seven, with members of Naruto Uzumaki, Sakura Haruno, Sai, and Yamato, is seen to be fighting a puppet creature that is controlled by Mukade in the ruins of Rouran. Makude's intention was revealed to be in pursuit of the Ryumyaku, which if one can wield they will have an unlimited amount of chakra source. When they pursue Makude further inside the ruins they find him absorbing the seal that was placed upon it by Minato. A huge blast transmit and Naruto was seen sucked into it along with Yamato. Sakura tries to follow but Sai stopped her and the scene ends with Sakura crying for Naruto as the blast expand.
Naruto wakes up to find himself in some kind of garden. He hears a teenage girl singing and approaches her but she runs away. Naruto roams the city out side of the garden. He is attacked by a group of puppet creatures that resembles the puppet that they were fighting at the ruins. He was outnumbered and saved only by Minato, Chouza Akimichi, Shibi Aburame who revealed to him that this is Rouran. Naruto later finds the girl again finding out that she is actually the Queen of Rouran Sara. Someone pushed Sara off the high towers and Naruto saves her. Minato approaches them and finally reveal to Naruto that he is in the past and about another man from the future that appeared six years ago. This is revealed to be Anrokuzan, a man that Sara admires. Minato tells Naruto to protect Sara and heads off. A flashback is seen with Minato appointing Kakashi to tag along with him on the mission and that he has a special task for him.
Sara is confronted by a group of peasants that reveals that their male members of the household was taken from them in her name. Sara doesn't remember ever doing that. Naruto catches up to her and is filled in. The peasants led a way outside of the palace to see the peasants that cheered her in a parade. They find out that they were only puppets. Sara has the ability to sense the source of the Ryumyaku and leads Naruto to the source where they find out that what the peasants said is true and that the males were being forced to make the puppet machines. Sara shut down the Ryumyaku source that is feeding the machines. Anrokuzan reveals that he is Mukade and they fight. Mukade's body transformed to a big puppet and began to rampage the city to kill Sara. In a reminiscence of her mother, Sara realizes that she has the power to shut down the Ryumyaku forever. She heads to the garden to put the peasants there where they will be protected and heads to the chamber to seal the powers. Naruto fights the monster puppet and is completely exhausted when Minato appears. He says he will reveal his weak spot and tells Naruto to hit him with a rasengan. Naruto says he ran out of chakra and Minato lent him his and combined their two rasengans to form a super rasengan. With it Naruto finally destroys the puppet and Mukade. Yamato make his first appearance saving Naruto, Sara and Minato from falling. Minato seals the Ryumyaku and is in the proccess of wiping out everyone's memory when he reveals Naruto's name hinting that he knows that he is his son, even though they never mentioned it.