The Justice League of America is the greatest team of superheroes the world has ever known. They've made many friends - and many enemies. But they've never seen anything like this. Calling itself the Shadow Cabinet, a group of stunningly powerful superhumans - led by the awesome alien powerhouse Icon - has appeared seemingly out of nowhere, threatening to steal the mortal remains of one of the League's deadliest enemies. What sinister force lurks in the shadows behind the battle? And even if the League comes ou on top, will personal rivalries and sudden departures destroy the team from within?