Ellen Robb came into Perry Mason's office with a gun in her purse. She had been framed, she said, by her gambler employer because she had refused to help fleece a customer.
The customer had dropped nearly $10,000 in the gambling establishment and then done his best to pick up Ellen. His wife, none too pleased with either shenanigan, ended up dead as a herring.
Della said Ellen was too beautiful to be trusted; Perry thought he could find out by switching guns on her - thus starting a series of explosions that nearly blast him out of court ...