Despite not knowing him, the world's most famous detectives can't pass up the offer of a "dinner and murder" invitation from wealthy Lionel Twain. Each has no idea until their arrival at Two Two Twain who else will be in attendance. Those detectives are: amateur sleuths and New York City socialites Dick and Dora Charleston, accompanied by their pet terrier, Myron; Belgian detective Monsieur Milo Perrier, accompanied by his chauffeur, Marcel; Shanghainese Inspector Sidney Wang, accompanied by his Japanese adopted son, Willie Wang; frumpish Brit Miss Jessica Marbles, accompanied by her invalid nurse, Miss Withers; and San Francisco gumshoe Sam Diamond, accompanied by his femme fatale sidekick, Tess Skeffington. The dinner part of the invitation runs into problems due to the non-communication between Twain's blind butler, Jamesir Bensonmum, and Twain's new deaf-mute and non-Anglophone cook, Yetta. On the murder side, the guests initially believe Twain will try to kill each of them. ...