After taking back Killua, the four friends decided to go on their separate ways, in order to pursue each and their own goals. Kurapica left to go and try to take a bodyguard job, while Leorio continued on and pursue Medical Studies to become a doctor. Gon and Killua decided to stay together and participate in the one of the most famous fighting tournament in the world, that takes place in high tower called, The Heaven's Arena. During their time in the tower, the duo learned of a mysterious power called Nen.
