From the Universal synopsis: Retired Inspector Blake of Scotland Yard learns that Lord Blanton has acquired the sacred "Love Ring"---a cursed jewel that has brought grief to its previous owners. Prince Darius seeks to obtain the ring, and the mummy of a princess of an ancient country to return them to his homeland.
| Actor | Role |
|---|---|
 Crauford KentInspector Angus Blake | Inspector Angus Blake |
 Florence AllenLady Diana Blanton | Lady Diana Blanton |
 Albert PriscoPrince Darius (as Albert Priscoe) | Prince Darius (as Albert Priscoe) |
 Monte MontagueJarvis | Jarvis |
 Grace CunardMary Duveen- aka Queen of Diamonds | Mary Duveen- aka Queen of Diamonds |
 Herbert PriorLord Blanton | Lord Blanton |