Chester Morris
Detective Anderson
Chance Ward
Police lieutenant
Una Merkel
Dale Van Gorder
Richard Tucker
Mr. Bell
Wilson Benge
The Butler
DeWitt Jennings
Police Captain
Sidney D'Albrook
Police Sergeant
S.E. Jennings
Man in Black Mask
Grayce Hampton
Miss Cornelia van Gorder
Maude Eburne
Lizzie Allen
Spencer Charters
The Caretaker
William Bakewell
Brook
Infamous burglar "The Bat" commits a daring jewelry theft despite heavy police presence. Soon after, a bank theft occurs, which may be the work of the criminal as well. Meanwhile, Cornelia Van Gorder has various people arrive at her old mansion, including her niece, Dale, a bank employee, and police detective Anderson. When guests start turning up dead, Cornelia begins to suspect that The Bat may be lurking around the estate.
