Catwoman makes her return known with a string of robberies. Hoping to lure her into a trap, Batman plants a news blurb giving the whereabouts of a rare canary, but Catwoman is tipped off and arrives prepared. Batman and Robin follow a lead to Catwoman's hideout, the Pink Sandbox, but soon discover that this villain has been waiting for them.

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.