After her well-to-do Aunt Sarah is caught shoplifting, Virginia Trent is convinced she needs to seek psychiatric help for kleptomania. So why does Virginia turn to legal eagle Perry Mason? Because a cache of valuable diamonds-left in Sarah's care-has suddenly vanished into thin air.

Virginia thinks Sarah swiped the stones, but gem dealer Austin Cullens begs to differ. In fact, he's prepared to forgive and forget-until he is mysteriously murdered and Sarah is caught running from the crime scene. Now it appears the lady with the sticky fingers may have blood on her hands. . . .