During a killing operation, the Phantom Troupe happened to encounter members of a terrifying killer family. Their methods were cruel and cold-blooded. Everyone who encountered this family died without a chance to survive. Therefore, no one knew about it except for the Beater family, which is also famous in the killer world.
The girl who joined the Phantom Troupe at the invitation of the leader, Chrollo, became the hidden "No. 14". Feitan and Ye Yu vaguely have an irreplaceable relationship with each other that transcends the friendship between the members.
The agreement between the Hour family led to the encounter between Killua and Yatsumi. Behind the simple truth about Izayoi and the Killer family, there is a terrifying fact hidden. The Izayoi family, which places the responsibility for Yatsumi's serious injury in the first battle on the Phantom Troupe, is about to go into full-scale war with the Phantom Troupe, bringing unprecedented destruction.
Faced with the cruel facts, can the two cherish each other again?