"Perry Mason wasn't quite sure who his client was. He didn't even know whether she was alive or dead! Equally mystified, Paul Drake couldn't decide whether he was trailing suspects in his usual expert fashion--or leading the killer to the next victim! As for Della Street: she was far from convinced by the desperate telephone voice with the cryptic message: 'I'm sending you an envelope stuffed with money. You've got to help me, Mr.Mason...' " --

Perry Mason is hired to identify a woman based on an appendix scar, as she fears being a look-alike to an heiress may be a setup for her arrest. A classic mystery!

Virginia Baxter is the only witness still living who can vouch for the authenticity of Lauretta Trent’s will. Lauretta Trent, a wealthy widow, is also still living. But for how long? Someone has been peppering the spicy food Lauretta loves with arsenic. Could it be the same someone who tried framing Virginia Baxter for drug smuggling? Lauretta doesn’t trust her greedy heirs. But could a scheming servant be behind a master plan to fleece her estate? It all seems to fit. But when Lauretta is murdered on the highway, all the evidence places Virginia Baxter squarely in the driver’s seat. Confused? Just think how Virginia’s lawyer, Perry Mason, must feel.

Mason is hired to identify a woman based on an appendix scar, as she fears being a look-alike to an heiress may be a setup for her arrest. Mason later defends the heiress on murder charges.