The Algerian consul solicits the aid of the Chief of the Secret Service in the apprehension of the sultan's brother, Abdullah, who has fled with the royal harem and the royal jewels to the United States. The chief assigns Peggy, his most reliable feminine operative, to the case. Newspaperman Hal Tracy, Peggy's sweetheart, is on the scene when Peggy attempts to arrest Abdullah. In the ensuing fight, Hal is thrown overboard, and Peggy, for the first time in her life forgetting her duty, dives in after him. She follows Abdullah to his mountain hideout and later gains entrance to his harem in the guise of an Algerian woman. Her position becomes more perilous each night, and she finds herself struggling with Abdullah just as Hal arrives with help. Abdullah is arrested, and the jewels are recovered. Peggy and Hal are denied permission to marry, since the chief has another assignment for Peggy.