Continuing legendary comic writer Chuck Dixon takes on the crime fighting duo consisting of Oracle, the computer genius who used to fight crime as Batgirl--paralyzed by the Joker but still very much in action--and Black Canary, the young adventuress who feels she has something to prove to the world. Things go awry when Black Canary is boom tubed across the multiverse to Apokolips! Special appearances by Powergirl, Catwoman and Robin. After the tragic events of BATMAN: THE KILLING JOKE, The Oracle must face the Joker"