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Earle Williams, known for his manly, often dignified, characters, was well cast in this mystery, which keeps the audience guessing until the very end. Someone in India is deciphering secret codes and passing information from London's Downing Street to the natives, so Captain Robert Kent (Williams) comes down from London to investigate. He disguises himself as a Rajah, and Colonel Wentworth (Charles Hill Mailes) introduces him to the colony. There are several suspects, including Captain Graves (Herbert Prior) and his wife, Norma (Kathryn Adams), who is having an affair with Maharajah Jenan (future horror icon Boris Karloff). When Norma commits suicide, Wentworthis quick to put the blame on her. But unbeknownst to all involved, Kent has made up a couple of fake messages. This is where Wentworth trips himself up and reveals that he is the guilty party.