One dark and stormy night on the outskirts of 1950s Washington DC, six high-profile guests arrive at a party hosted in an eerie old mansion. None of them know who has invited them, and all have been asked to adopt pseudonyms to conceal their identities. Soon enough, the mansion’s butler, Wadsworth, reveals to them that their host is a man named Mr. Boddy who has been blackmailing all of them to profit off of their shady businesses and scandals. But when Mr. Boddy suddenly turns up dead, panic, chaos and hilarity ensue as the guests point accusatory fingers at one another to determine the killer. But is anyone truly innocent? And what were they really invited for?