Photographer Whitty Gawship attends a prestigious get-together at the residence of the impressive Professor Chet Chatters. Members of the party are veteran conversationalists, each trying to gain subtle power over one-another. The mood shifts when Whitty and the others discover that the professor can get the "Last Word" in every conversation via his miraculous invention. Dastardly! But what are the professor's motives? And why invite a commoner?