It has been two and a half years since Naruto Uzumaki left Konohagakure, the Hidden Leaf Village, for intense training following events which fueled his desire to be stronger. Now Akatsuki, the mysterious organization of elite rogue ninja, is closing in on their grand plan which may threaten the safety of the entire shinobi world. Although Naruto is older and sinister events loom on the horizon, he has changed little in personality—still rambunctious and childish—though he is now far more confident and possesses an even greater determination to protect his friends and home. Come whatever may, Naruto will carry on with the fight for what is important to him, even at the expense of his own body, in the continuation of the saga about the boy who wishes to become Hokage.

The second part of Nanbaka. The prisoners and their guards continue their comfortable lives at Nanba Prison. However, from the shadows emerges a new threat: Enki Gokuu, a person from Samon's past, who has mysterious goals of his own.

Nanba is the world's most formidable prison, built to incarcerate criminals who are too slippery to stay in ordinary confinement. The four inmates who occupy Cell 13 are particularly cunning on that behalf, having escaped every other prison with a perfect success rate. There is Juugo, a specialist in locks who has spent the majority of his life in prison; Uno, a gambler with great intuition; Nico, an otaku whose body reacts strangely to drugs; and Rock, a bruiser with a love for food. The daily shenanigans of the four prisoners always cause trouble for the building supervisor, Hajime Sugoroku, who desperately tries to prevent them from breaking out of Nanba. Nanbaka follows the comedic, sparkle-filled exploits of these prisoners and their guards. From three square meals a day to sports festivals, prison life in Nanba isn't actually that bad—and it is the closest these four have to a home.

Led by Yamato, Naruto Uzumaki, Sakura Haruno, and Sai are assigned to capture Mukade, a rogue ninja who is pursuing the ancient chakra Ryuumyaku located underneath the Rouran ruins. While the Ryuumyaku has been sealed by the Fourth Hokage, the group fails to prevent Mukade from releasing its power. Consequently, a strong energy burst engulfs both Naruto and Yamato before they can escape. As he awakens in a magnificent yet hostile kingdom, Naruto meets its young queen Saara and three Konohagakure ninjas on a top-secret mission. They reveal to him that he has time-traveled to Rouran 20 years into the past! To make matters worse, Mukade has already infiltrated the royal court, becoming the naive queen's most trusted minister under the alias Anrokuzan. Joining forces with the three ninjas, Naruto must protect Saara's life without fail to stop the villain's plans and return to the present.