The Hopeless Diamond, stolen from Stiftany's jewelry store by Big Gus's gang, is accidentally swallowed by Benny. Benny is subsequently taken to the gang's hideout where Dr. Rigor Morten plans to surgically remove the stone. In order to rescue their friend (and try to cash in on Stiffany's $50,000 reward), Top Cat and his friends visit the hideout posing as ""The Unscratchables."" The gang returns to Stiffany's, where Benny's violent sneeze dislodges the stone. Unfortunately, it sails through the window and onto the street, and is crushed by a steamroller.