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.
Franklin Blake
Ann Verinder
Carl Von Lucker
Godfrey Ablewhite
Sir John Verinder
Inspector Cuff
Betteredge
Yandoo
Sir Basil Wynard
Dr. Ezra Jennings
Roseanna Spearman
Henry, Butler
Driver
Sutter
Robbin
Detective (Uncredited)