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The White Black Sheep in this stiff-upper-lip actioner is Robert Kincairn (Richard Bartheless), the dissolute son of a British colonel (William H. Tooker). Though outwardly a wastrel, Kincaim is gallant enough to take the blame for a robbery perpetrated by his fiancee Enid (Constance Howard). Thrown out of his household in disgrace, he vows to redeem himself by changing his name, joining the army, and heading off to a desert outpost near Palestine. Rescuing Greek dancing girl Zelle (Patsy Ruth Miller) from the unwanted advances of the treacherous El Rahib (Gino Corrado), Kincairn earns himself a powerful enemy -- which he later discovers when, while working undercover to spy on the enemy, he is captured by Rahib's minions and subjected to hideous tortures. Fortunately, our hero escapes in time to warn his superior officers of an impending Arab attack. A happy ending is assured when Kincairn's ex-fiancee confesses to her crime, whereupon Kincairn is warmly forgiven by his father -- who, as luck would have it, has been placed in charge of his son's regiment!