War veteran, knight of the Order of St. Dumas, and now The Joker's key recruit in the crusade against Batman Azrael, Agent of the Bat, is the Dark Knight's most powerful new threat, and the one living link to a devastating secret about the Wayne family's legacy in Gotham City. In an effort to overthrow Batman, Azrael dons an armored Batsuit of his own and threatens to take control of the city.