The Dark Knight investigates the artifacts stolen by the Scarecrow and Man-Bat, only to learn that they are for use in a black mass—yet neither criminal is versed in the dark arts. Plus, the monster known as Midnight strikes again, and Clayface has emerged anew, determined to return the citizens of Gotham to the earth—by ingesting them!

Midnight's campaign of terror continues, as the mysterious villains brings Clayface into the fold.