Holy groovy garage band Batman, the Joker has been released from jail and teamed up with Catwoman. They are on the trail of a cache of gunpowder for their next caper. But with the aid of Batgirl, the dynamic duo are on their case and soon head over to record tycoon, Little Louie Groovy's place looking for clues... but wait... Little Louie is working... Who is he recording tonight? "A new group I just discovered about twenty minutes ago, called the Gotham Boulevard Offramp. They oughta have the number one record in the country week from next Tuesday."