Sex Criminals' Chip Zdarsky and Alien 3's Johnnie Christmas team up for the first time with this action-packed Hammerverse special. Before he was trapped with Spiral City's greatest heroes on a mysterious limbo farm, aging hero Abraham Slam found himself already an outcast in his own world. And with the arrival of a belligerent reboot hero named Uncle Slam he finds himself having to put on the old tights again to show that there can be only one Slam in town.