Croyd Crenson, better known in Jokertown as "The Sleeper," has tracked down the Dog Masked serial killer who framed him for murder. Unfortunately, this mysterious man is an Ace with the ability to dematerialize at will, which means he's impossible to pin down! Will Crenson and Alex be able to stop him from striking again? Or will one of them be his next victim? Meanwhile, Simon has tracked down Kira but will he be able to save her in time? More importantly, does she want to be saved?