With Superman now living on another planet in the wake of NEW KRYPTON, it's up to his old friend Mon-El to protect Metropolis.

Following the startling events of NEW KRYPTON, Earth finds itself without Superman. Luckily, Metropolis still has heroes like Mon-El and the Guardian. But after years of knowing nothing but the solitude of the Phantom Zone, how will Mon-El acclimate himself to society? And the recently returned Guardian has his hands full with his new position in the Science Police. How can they fill Superman's boots?