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The Missing Guest is the first of two remakes of the 1933 melodrama Secret of the Blue Room. The audience knows what it's in for when they're introduced to the hero (Paul Kelly), a hotshot reporter named "Scoop" (what else?) When a young man mysteriously disappears in the "forbidden room" of a supposedly haunted mansion, Scoop arrives on the scene to investigate. After two people meet horrible deaths in the aforementioned room, our hero suspects that the killer isn't supernatural in nature. He's right, but the audience could have told him this from the get-go. Constance Moore is the hand-wringing heroine, while William Lundigan also plays a pivotal role (hint, hint). The Missing Guest was refilmed in 1944 as the old-dark-house musical (!) Murder in the Blue Room--same plot, and even the same killer.