The Hunter Exam arc (ハンター試し験けん編へん, Hantā Shiken-hen) is the first story arc of the series and follows Gon on his journey to become a Hunter and find his father. After becoming friends with Kurapika, Leorio, and Killua, Gon must endure the Hunter Exam's deadly phases to obtain an all-important Hunter License. This is part 1 which is running to follow an Examiner through a 100 mile tunnel, but you only have 1 day to complete it