Kyle Rayner hasn't been the new Green Lantern very long when he finds his powers growing. His power ring no longer needs charging and he can draw on huge reserves of will power to do his tasks. He needs all his cosmic powers to stop his evil opposite Oblivion but in doing so Kyle is transformed into something even more powerful, something he calls Ion. Great power can be used for good or evil and while Kyle save countless lives his friends are beginning to fear him. Can he master his power for good?