Assigned to map and contact new lifeforms past the 3,600 known sectors of space protected by the Green Lantern Corps, John Stewart and an elite team of Lanterns are trapped behind enemy lines and fighting for their lives when the Central Power Battery goes dark and leaves the entire corps defenseless. Meanwhile, across the cosmos, Green Lantern Jessica Cruz finds herself powerless and forced to battle the invading Yellow Lanterns of the Sinestro Corps, and Guy Gardner, trapped on distant world, decides to reopen Warriors Bar.