After the Chimera Ant incident is resolved, the Hunter Association's top echelons the Zodiacs, from which Ging is a member, begin the process of choosing Netero's replacement as Chairman, while Killua returns home to ask for his younger sister Alluka to save Gon's life. However, his family is unwilling to risk losing Alluka or having her dangerous powers used against them, but after evading his older brother Illumi's attempts to intercept him, Killua manages to bring Alluka to Gon's side and have him fully recovered, before sealing her powers completely to ensure that she can have a normal life. Killua then parts ways with Gon, as he wants to travel the world with Alluka who had never seen the outside world before, while Gon himself finally meets his father and learns the true nature of his quest.