A man named Mr Inch comes to Nero Wolfe with a matter of being falsely accused of murder. He may be a thief, but he has never killed someone. Though the cops are close at hand, and haul Inch away, Nero has reason to believe the crook isn’t the killer. Inspector Kramer now believes that Nero has the missing diamonds in his safe.
Interviewing others who were at the party, Nero gathers information, and verifies details. A writer from a magazine arrives, and wants to write about Nero. Archie doesn’t think its a good idea, but Nero is fascinated in her work. Developments take place to cause Nero to drop the writer, but the cute honey blonde now has a date with Archie.
Archie finds out what Nero already knows. Valerie is a phonie, and was also at the party. What other sneaky secrets might the fake magazine writer, Valerie be hiding? Nero is ready to call the police in for the big reveal. All the party guests are gathered, and the details are laid bare.