Harley s pursuit of the Golden Age killer gets personal. Still in the fog of her discovery about Hector s obsession, she relives her darkest memory of Jack s transformation into The Joker and her own early evolution into Harley Quinn. With Bruce s counsel, she grapples with the guilt of her past and makes a choice that sends her straight into Starlet and the Producer s den for an expertly staged showdown that will either crack the case or end her life.