The magic tree house takes Jack and Annie back in time to feudal Japan where the siblings learn about the ways of the Ninja.

With their sensei by their side, the ninjas go to the Underworld and face Lord Garmadon to obtain the final golden weapon.

"Naruto, Sasuke and Sakura have passed the final test to become junior ninja - but now the challenge begins. Tired of menial tasks, the young ninja ask for a tougher assignment, and find themselves - together with their teacher, Kakashi - body guarding a cranky old man from the Land of Waves. But Tazuna the bridgebuilder is in more danger than anyone realizes : he's the target of elite ninja assassins, including Zabuza, 'the demon', and our heroes...

With Naruto knocked out, Guy decides to risk his life and take on the powerful Madara, asking everyone else to save Naruto.

The Five Kage, a reincarnated Hokage, the Shinobi Alliance, Naruto, and Sasuke all battle with Obito, but it is his past that finally unseats him, while at the same time, Madara moves to become the next Rikudou Sennin.

In the village of Konohagakure, school is literally a battlefield where classmates are ninjas in training competing to become the greatest ninja in the land.

"Now aligned with the tailed beasts and his fellow jinchuriki hosts more than ever, Naruto impresses the Allied Shinobi Forces with his newfound strength. But his comrades are not going to leave this final battle with the forces of Tobi up to Naruto alone. As they rush to assist their friend, Sasuke returns. And this time, he's intent on taking out Naruto once and for all" -- from publisher's web site.