Being some of the few Genins available, Naruto, Ino, and Shino are forced to accompany Anko on her mission to the Sea Country to destroy a sea monster and protect a boat carrying gold. However, Anko is acting strange as she begins to remember more and more events from her past, and the connection she once had with Orochimaru.

Naruto is recovering thanks to the mysterious girl, Isaribi. While Naruto is recovering, Anko, Shino, and Ino search for him and also meet the man in charge of the payroll shipment. The group eventually meets back up, but not before finding the sea monster's lair.

After Isaribi escapes, Naruto and his team decide to go to the forbidden island and confront Orochimaru and his subordinates. They soon discover that Orochimaru is not the man behind the curtain, but a man known as Amachi. Amachi is the one responsible for turning Isaribi into a monster, so why is she helping him?

After narrowly escaping the collapsing lab, Naruto and the others must catch up to the money convoy. However, Amachi has already set his trap, and the convoy crew has taken the bait. Naruto and the others arrive to save the day, as all of them prepare for battle. But can the group defeat Amachi when he reveals his true self? And what will happen when Isaribi realizes how far Naruto will go to save her?

Naruto and Amachi's battle comes to a rather quick end, or does it? Also, Anko recovers more of her past including a significant event.