Gotham's new DA, Janet Van Dorn, is out to capture Batman, but both she and him end up captured by a gang of criminals instead. They are soon put on a kangaroo trial by the Joker (the judge), Two-Face (the prosecutor), the Ventriloquist (the bailiff), Poison Ivy, Harley Quinn, the Mad Hatter, Killer Croc, the Scarecrow, the Riddler, and other criminals. If the defense (Batman and the D.A.) can prove that Batman is not the cause for everyone's turn to crime, they will be set free. When the jury gives the verdict of 'not guilty', the villains have little intention of following through on their deal.