Hal and Kilowog discover that a group of Red Lanterns, including the conflicted Razer and the vile Zilius Zox have been targeting and eliminating Green Lanterns in Frontier Space. Along with the help from a surviving Frontier Space Green Lantern Shyir Rev , Hal and Kilowog must stop the Red Lantern leader Atrocitus from destroying Shyir's home planet of Colony 12.