The Gift

Ten years after the prestigious Hunter Exam that started the friendship of Gon, Killua, Kurapika and Leorio, what has become of their lives?
Leorio is now a practicing Medical doctor struggling for senior promotion in the most competitive hospital in York New City.
Kurapica finally assumed responsibility as one of the Zodiacs in the Hunter Association.
While Gon, after settling scores with his long lost father, has grown into a well-known hunter.
On the otherhand, Killua, after parting ways with Gon, travelled the world with his little brother Alluka, who also carries a very special ability which his family is after.
Alluka has gone sick, and this dilemma caused all their paths to cross again for another adventure with new characters from Leorio's field.