Hunters are a special breed, dedicated to tracking down treasures, magical beasts, and even other people. But such pursuits require a license, and less than one in a hundred thousand can pass the grueling qualification exam. Those who do pass gain access to restricted areas, amazing stores of information, and the right to call themselves Hunters.

While the King is preoccupied with playing Gungi, Gon and the other Hunters sneak closer and closer to their target. They get a lucky break when an unforeseen accident results in the deactivation of Neferpitou's En, making the defenses surrounding the castle temporarily vulnerable. The Extermination team readies for their showdown, but with only a few days left before the "selection," will they be in time to save the citizens from certain death?!