More than three billion years ago, a race of immortals known as the Guardians of the Universe, established a team of heroes based out of a planet at the very center of creation and assigned to defend freedom and justice across the many galaxies. Each hero is given a ring that bestows awesome power. Together they are known as the Green Lantern Corps. When Earth's new representative to the Corps, Hal Jordan is recruited and placed under the supervision of senior Lantern Sinestro, he comes to realize that his trainer and mentor is at the heart of a secret conspiracy threatening the philosophy, tradition and very existence of the Corps that has defended universal law for far longer than Jordan's homeworld has existed. Now, Jordan must quickly master his new powers to combat the treasonous Lanterns in order to maintain order across the universe.