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
Franklin Blake
Phyllis Barry
Ann Verinder
Gustav von Seyffertitz
Carl Von Lucker
Jameson Thomas
Godfrey Ablewhite
Herbert Bunston
Sir John Verinder
Charles Irwin
Inspector Cuff
Elspeth Dudgeon
Betteredge
John Davidson
Yandoo
