Pete Marshall is sent as a replacement to the mountain district town of Plainville when a public opinion surveyor who went there goes missing. Visiting the hillbilly family of Mamie Fleagle, Pete begins to suspect that she and her two sons have murdered the surveyor. Pete then believes that Mamie is slowly poisoning wealthy Grandma Fleagle, who has put a vital clue to her fortune in a nonsensical embroidered sampler.
Fred MacMurray
as Pete Marshall
Helen Walker
as Claire Matthews
Marjorie Main
as Mamie Fleagle Smithers Johnson
Jean Heather
as Elany Fleagle
Porter Hall
as Mr. Johnson
Peter Whitney
as Mert Fleagle / Bert Fleagle
Mabel Paige
as Grandma Fleagle
Barbara Pepper
as Bonnie Fleagle
Francis Ford
as Lee - Old Townsman (uncredited)
Harry Allen
as Old Deaf Townsman (uncredited)
Si Jenks
as 80-Year-Old Townsman (uncredited)
Walter Baldwin
as Vic Hardy (uncredited)
