And now, at the worst possible moment, a new threat strikes. Someone is using deadly means to defend the Justice League. Whoever it is seems to know everything there is to know about the team, from their deepest secrets to how to take down a Green Lantern. Can the Justice Leaguers overcome this opposition when their confidence in their leader is shaken? Or will the League finally lose to the one enemy it can't defeat--the will of the people it's sworn to protect?