Nolan Grayson (Omni-Man) is unquestionably the strongest being on our planet; he is also our most spirited protector, having saved the planet from untold calamity. His son Mark, wants nothing more than to follow in his footsteps. But there's something sinister afoot and Omni-man may not be what he appears. Which may prove even too much for the Guardians of the Globe.

As the Avengers and their allies have continued to protect the world from threats too large for any one hero to handle, a new danger has emerged from the cosmic shadows: Thanos. A despot of intergalactic infamy, his goal is to collect all six Infinity Stones, artifacts of unimaginable power, and use them to inflict his twisted will on all of reality. Everything the Avengers have fought for has led up to this moment - the fate of Earth and existence itself has never been more uncertain.