"After a young couple and the woman's brother check into a hotel, the brother turns up missing. While no one at the hotel seems to know where the man is, let alone acknowledge he was even there, the woman decides to hire an investigator to look into the matter. The investigator, his assistant and the young couple find some strange circumstances at the hotel, which lead them to a shocking discovery," according to the DVD sleeve's synopsis.
Ah
it's the old vanishing relative plot. This one moves along quite nicely, thanks to writer John Thomas Neville beginning his version from an interesting angle: hotel patron Hooper Atchley (as Steven Walcott) calls upon an old friend, investigator William Boyd (as William Cornish), after finding a human ear bone in his fireplace. Then, Mr. Atchley collapses
The unraveling mystery is engaging; and, the movie works as a filmed stage play.
Columbia Pictures model Claudia Dell (as Enid Van Buren) gets to play frightened in a mortuary, and Robert Harron's brother John ("Johnny" Harron, as Erich) has a good expositional scene explaining his involvement in the intrigue. Forgotten film veteran Phillips Smalley (as Dr. Bronson) is another asset. "Midnight Warning" obviously needs Alfred Hitchcock's direction, and a more satisfying conclusion (see "The Lady Vanishes").
***** Midnight Warning (11/15/32) Spencer Gordon Bennet ~ William Stage Boyd, Claudia Dell, John Harron