One day, Kurapika spots a child who looks very similar to his childhood friend, Pyro. However, when he catches up to him, the boy steals Kurapika's eyes with some kind of magical power. Gon, Leorio, and Killua promise to help find who took his eyes and get them back, but Killua is having his own problems when he is forced to face his past and whether he really is worthy to have Gon as a friend.

Isaac Netero is the chairman of the Hunter Association. Decades ago he sealed away Jed, a Hunter who had mastered the use of On, the dark "shadow" of Nen. Now On users have reappeared at the Heaven's Arena "Battle Olympia" tournament. For Netero, this is the last mission: to protect the Association and the world from a threat driven by hatred and the thirst for revenge. And he's going to need all the help he can get in order to succeed.