Joker is paroled and teams up with Catwoman to steal a million pounds of dynamite, blow a hole in the Federal Depository, and haul out the money. Batman, Robin, and Batgirl race to unravel clues and beat the Dastardly Duo at their deadly game.

Louie the Lilac's gang kidnap Bruce Wayne and Dick Grayson for a hefty ransom. Batgirl attempts a rescue.