Horace Wadsworth, disinherited brother of New York banker Arthur Wadsworth, joins a gang of international criminals. He plots to rob his brother's bank by constructing a tunnel from the nearby home of antique dealer George Jones, who is currently on a trip to Cairo to purchase antique rugs. Horace follows him there, and learning of the Sacred Carpet of Bagdad, joins the caravan of its sworn guardian, Mohamed. Meanwhile, Horace's confederates Major Callahan and Mrs. Chedsoye arrive in Cairo along with Mrs. Chedsoye's daughter, Fortune, who is unaware of her mother's illicit activities.
Devenu propriétaire d'une immense fortune, Bruce Wilton n'a qu'une pensée : rendre sa compagne, Vera, heureuse en la couvrant de cadeaux. Mais un jour, il reçoit une lettre anonyme compromettante. Il en informe le Père Kelly, son ancien précepteur. Le prêtre va tenter de retrouver la personne qui tente de déstabiliser le foyer...