Ep 15. The Secret Weapon Is Called....

After successfully retrieving the “Data Crystal” from Guren, Naruto and his fellow Leaf Shinobi set off to the Land of Iron to deliver the information to the feudal lord. However, they are ambushed by a group of Mist Shinobi led by a man named Raiga. In the heat of battle, Sai reveals that the Crystal is a fake and that the real information is stored within him.

This revelation sparks a debate among the group as to why they were not informed of the true contents of the mission. Their suspicions are further heightened when they discover that the Mist Shinobi are also after Sai, creating a dangerous race to get him to the Land of Iron before they are caught.

As they journey through the treacherous landscape, the group encounters a mysterious figure who turns out to be none other than Yamato, the replacement leader of Team Kakashi. With his help and a strategic plan, they manage to elude the Mist Shinobi and make it to the Land of Iron.

Once there, they meet with the feudal lord, who is revealed to be the adoptive grandfather of Fuu, a young Jinchuriki that the group had previously encountered. The feudal lord agrees to help protect Sai and the information, and provides the group with a powerful escort.

The episode culminates in a dramatic battle between the Leaf Shinobi and Raiga, where they discover that his weapon is powered by lightning chakra. Naruto and his team are ultimately able to defeat Raiga, but not before Sai reveals the location of Orochimaru's hideout, leading to a new mission for the group.

Overall, “The Secret Weapon Is Called…” is a thrilling episode that combines action, intrigue, and a touch of mystery. It showcases the strength and determination of the Leaf Shinobi, as they fight to protect their comrade and complete their mission. The introduction of Yamato adds a new dynamic to the team and suggests that there may be more to come in future episodes.