Test pilot Hal Jordan is chosen to become a Green Lantern, members of an intergalactic police force, after the death of the previous protector of Earth's sector. He is given a power ring and battery (lantern) that grants him superhuman powers. Under the guidance of senior Green Lantern Sinestro, Jordan is quickly thrust into the depth of space to receive his training. During this training, he learns about the Green Lantern Corps, an organization committed to maintaining order across the universe, and their power source, the Green Lantern Power Battery, which is fueled by the green energy of willpower.

Jordan's training is cut short when they stumble upon a new threat: a rogue Green Lantern who has found a way to manipulate the yellow energy of fear, a power thought to be uncontrollable and more potent than the green energy of willpower. This discovery leads to a conflict that threatens the very existence of the Green Lantern Corps and the universe itself. As Jordan gets involved, his determination and courage are put to the test, unveiling not only his character's true strength but also laying down the foundation for his destiny as a key member of the Green Lantern Corps. The struggle against the manipulation of fear versus the willpower embodies the central conflict of their mission and the personal journey of Jordan as he transitions from a mere human to a protector of universal peace and justice.