Tired of doing lame missions, Naruto asks the Hokage to give them something challenging. The Hokage caves and gives them a C-rank mission. They will be bodyguards for a bridge builder. It appears to be a simple mission, until the group is attacked by something more than common thugs...other ninja!

Naruto and his squad arrive in the Land of the Waves and learn that an evil businessman named Gato has taken over the land.

With Kakashi captured, Naruto, Sasuke and Sakura must defend against Zabuza's attacks. Naruto realizes that working together with Sasuke may be the only way to save Kakashi. Will the combined effort of the two be enough to free Kakashi and defeat Zabuza?

With Kakashi free, the fight between him and Zabuza resumes. Kakashi decides to show Zabuza what the Sharingan is really capable of. Can Kakashi's Sharingan defeat Zabuza? And who is the mysterious person watching the fight?

With Zabuza gone things are now settling and Tazuna can go and build the bridge without fear. Or so everyone thinks. Kakashi believes something is wrong with Zabuza's death and teaches Naruto, Sakura, and Sasuke a way to train so they could better use their chakra. Is Zabuza really dead?

While Naruto and Sasuke train, Sakura watches over Tazuna. During a nice dinner, Sakura notices a man's face torn from a picture. The man's name was Kaiza, and he was what the country called...a "hero". What happened to cause Inari so much pain?

Naruto has a dangerous encounter with Haku in the forest, but is Haku there to cause trouble? Naruto and Sasuke better complete their training, as Zabuza is alive and has returned for round 2. Will Kakashi, Sasuke, and Sakura be able to defeat the Demon of the Mist? And, can Naruto arrive in time to help out?