Harley Quinn is back from Hell! The tragically disembodied troublemaker is wreaking havoc across Martian Manhunter's hometown, and the Manhunter's finding out that it's hard to stop the spirit form of one of the DCU's most random villains without being able to touch her. The Manhunter calls on the aid of the magician Zatanna to wrangle the slippery spirit, but even their combined efforts may not be much help once Harley figures out how to possess people at will.