After arriving in the Republic of Podokea, Gon, Leorio, and Kurapika board a tour bus to Kukuroo Mountain, where Killua lives. However, they're blocked by a massive "Testing Gate." Anyone who attempts to enter through the side door is eaten by Mike, the watchdog. Gon tells Zebro, the elderly gatekeeper, that they are friends of Killua and asks to be let in. Kurapika eventually realizes the front gate is not locked, unlike the smaller side gate, and Leorio struggles to open the gate...