David Huxley (Cary Grant) is a mild-mannered paleontologist. For the past four years, he has been trying to assemble the skeleton of a ''Brontosaurus'' but is missing one bone: the "intercostal clavicle". Adding to his stress is his impending marriage to the dour Alice Swallow (Virginia Walker) and the need to impress Elizabeth Random (May Robson), who is considering a million-dollar donation to his museum.