Test pilot Hal Jordan's existence undergoes a profound transformation upon inheriting a formidable ring from the expiring extraterrestrial Green Lantern, Abin Sur. Following his transportation to the celestial world of Oa, Hal participates in demanding preparation under the tutelage of Kilowog and acquires comprehensive understanding of the Green Lantern Corps' obligations. He encounters conflict with the autocratic Sinestro, who maintains that fear constitutes the fundamental mechanism for preserving societal order. Upon the disclosure of Sinestro's oppressive tactics, Hal orchestrates an operation to neutralize his threat.