«Clarissa, the wife of a Foreign Office diplomat, is given to daydreaming. «Supposing I were to come down one morning and find a dead body in the library, what should I do?» she muses. She has the chance to find out when she discovers a body — in her drawing-room! Desperate to dispose of it, she persuades her guests to help her, all the time knowing that one of them must also be the killer. Now, supposing a police inspector were to arrive...? Adapted as a novel by Charles Osborne.»