A valuable gem from India is stolen in an old dark mansion and it is up to Scotland Yard inspector Charles Irwin to find out who did it among all the suspects who were in the house.
David Manners
as Franklin Blake
Phyllis Barry
as Ann Verinder
Gustav von Seyffertitz
as Carl Von Lucker
Jameson Thomas
as Godfrey Ablewhite
Herbert Bunston
as Sir John Verinder
Charles Irwin
as Inspector Cuff
Elspeth Dudgeon
as Betteredge
John Davidson
as Yandoo
Claude King
as Sir Basil Wynard
Olaf Hytten
as Dr. Ezra Jennings
Evalyn Bostock
as Roseanna Spearman
Fred Walton
as Henry, Butler
