Catwoman deals with the aftermath of battling her sister, setting her against Harley Quinn and Poison Ivy in a brutal display of their villainous roots. Plus, The Joker is back in Arkham Asylum and Harley Quinn breaks back in with him - but is she there to stand by him or destroy him? Either way, Poison Ivy and Catwoman must put aside their tumultuous past to help their wayward friend.