A twisted tale told by Harley Quinn herself, as only Harley can tell it. When Gotham₂s most nefariously narcissistic villain, Roman Sionis, and his zealous right-hand, Zsasz, put a target on a young girl named Cass, the city is turned upside down looking for her. Harley, Huntress, Black Canary and Renee Montoya₂s paths collide, and the unlikely foursome has no choice but to team up to take Roman down.