Cynthia Brown has a story to tell Archie about her friend, Doris who was killed. A man who is at a party in Nero’s office is the one Cynthia is accusing. Archie mingles, and as he identifies the man, a scream shatters the air. A corpse at a party has a way of breaking it up.
With Inspector Kraemer on hand, Archie and Nero review the details of where people were, and when they were there. How was it done? What’s the motive? Guests at the party are questioned. The invasion of police authority has Nero especially disgruntled, but a clue to how Cynthia Brown fits . into the crime becomes a little more clear. Newspaper reporters soon descend when word gets out of the high profile guests, and the events in the famous residence of Nero Wolfe.
Nero and Archie discuss how trustworthy the story that Cynthia told might be. The killer is still being held with the guests, and Nero thinks he knows how to flush him out. Complications and danger set in for Archie, and the killer seems to have his own trap to shake off the investigators. The tables get turned and the killers disguise is exposed.