Gon Freecss, who is now a 14 year old and still cannot use Nen thinks about Killua and what could be going on with him since they haven't made contact with each other in 2 years. Mito tells her nephew to call him and see how he is doing, even though he hasn't reawakend his Nen yet and wanted to surprise him. Gon invites Killua over and he accepts, coming over the next day. Although there is some sadness within Killua that Gon cannot truly figure out. The two teenagers end up going through a lot that brings their friendship as best friends even closer.