It's been a year since The Joker took over Arkham, and Gotham is still trying to get back to normal in this all-new, 5-issue miniseries bridging the gap between the hit videogame Batman: Arkham Asylum and the exciting, upcoming sequel, Batman: Arkham City! And now, an attack by a pair of super-powered twins increases the threat level and triggers Gotham City's new mayor to call for drastic measures.