"THE EXTREMISTS" part two! Believing heroes to be threats to the survival of any world, Lord Havok and the Extremists have already murdered the mightiest heroes from their home dimension. To save our Earth they'd kill thousands more, starting with the newly formed JLA. But eye-to-eye, are Havok's and Batman's goals that different? Billions of lives depend on the answer.

Meet the Extremists-self-proclaimed saviors from another Earth, they thirst for peace, prosperity and total submission to the will of their leader, Lord Havok! How can the newly assembled JLA stop this group of misguided maniacs before the Extremists unleash their own unique-not to mention dangerous!-brand of law and order on our chaotic world?