Robin, Superboy, Kid Flash, Aqualad, Artemis and Miss Martian join forces against some of the most dangerous enemies of the universe. These super sidekicks battle, with loyalties tested, coming together to defeat their toughest enemies.

Can Batman prevail against an unstoppable intergalactic machine with the power to bend time itself? Until now, the Justice League has triumphed over every foe who has challenged them. But all of those enemies had one thing in common: they were alive. This time, they face Brainiac a super-intelligent invulnerable machine whose mad quest endangers all life in the galaxy.