Left broken and scattered in the wake of Krakoa, the X-Men have since regrouped into distinct teams. In Jed MacKay and Ryan Stegman’s X-MEN, Cyclops leads a squad of hardened mutant soldiers out of an abandoned Sentinel factory in Alaska. While in Gail Simone and David Marquez’s UNCANNY X-MEN, Rogue attempts to build a new home with her chosen X-family and a handful of new students in Louisiana. Their different approaches to the X-Men’s mission erupt into a tense standoff when a plan of action is needed to take down Graymalkin Prison, formerly Xavier’s Institute.

The X-Men’s school has been transformed into a brutal penitentiary for mutants by the callous Dr. Corina Ellis, and her prize inmate is none other than Professor X himself! But after his actions during Krakoa’s fall, is Professor X worth saving? And who or what is the secret weapon Ellis is confident will protect Graymalkin against any attack? Find out in this four-part mutant milestone that solidifies the X-Men’s post-Krakoan world!