"A great disaster of cosmic proportions threatens all of reality. Only one man in the countless microcosms of the 52 known universes can top it -- Ray Palmer, the original Atom. But Palmer vanished long ago, and no one knows where he is. Now it is up to Ryan Choi, the young man who took the mantle as the all-new Atom, to begin a desperate quest that will take him through subatomic worlds to find the man who can save the universe. But even as Ryan journeys through inner space with his strange allies, the Challengers from Beyond, beside him -- a new threat to his hometown looms. Will he abandon this important quest to save his friends? Will he be given a choice?"--P.  of cover.