The Hunter Exams are over, and Gon's now a certified Hunter, despite being knocked unconscious from his fierce bout with the ninja Hanzo! After waking, Gon's not satisfied upon hearing how events unfolded for his newfound friend Killua, who disqualified himself from the Exam. Under pressure from his family of assassins, Killua returns to his home. Gon, Kurapika and Leorio travel to Killua's home in the hopes of freeing his friend from his assassin family's clutches.

Gon doesn't like how he passed the Hunter Exam. He can't recognize himself as a true Hunter until he squares off against Hisoka and gives him a good punch in the face. But to do so, he'll have to get stronger. And what better place to get stronger than an entire tower devoted to fighting—the Heavens Arena!

Heavens Arena is a tower combat arena, where the victors ascend floors while the losers stay down below. But to advance, Gon and Killua will have to learn how to use Nen, the ability to control the life energy, or "aura," that suffuses living things. In fact, Gon can't be officially recognized as a true Hunter until he learns and masters Nen! Lucky for him, Wing, a proficient in Nen, is there training his disciple Zushi. Wing recognizes the latent talent in Gon and Killua and decides to teach them the fine art of Nen.

As Gon and Killua ascend the Tower, they surprisingly find Hisoka on the 200th floor, where the elite fighters reside! But Hisoka isn't quite ready yet to fight Gon, since he doesn't want to pluck an unripe fruit before its time. Undeterred, Gon is hard at work, readying himself for the day he can confidently challenge Hisoka!

Can Gon master Nen and defeat the seemingly invincible Hisoka?! Find out by reading volumes 5–7, available now!