With the King preoccupied with playing Gungi, Gon and the other Hunters sneak closer and closer to their target. An unforeseen accident results in the deactivation of Neferpitou's En, making the defenses surrounding the king's 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 all the citizens from turning into Ant soldiers?!