Catwoman disguises herself as a wealthy recluse - Minerva Matthews - to exchange a quarter million dollars for two Stradivarius violins. Once the instruments are safely in her hands, the villain reveals her true identity and demands the cash back. But Catwoman is surprised to learn that her business partner - Zubin Zucchini - is also not who he appears to be.

Failing to destroy Batman and Robin, the Minstrel enacts "Plan High C." He shakes the building of the Gotham City Exchange, and promises to send it crumbling down if his demands are not met in one hour. Batman assumes cutting off the building's power will thwart the villain, but when that plan fails, it's up to the Dynamic Duo to track down the Minstrel before it's too late.