Burning Sands (1922)

Englishman Daniel Lane gets involved in the dynastic intrigues of an old desert sheik whose son and another Briton named Robert Barthampton plot against him. Lane's girlfriend Muriel visits him, determined to stop Lizette, whom she suspects is Lane's mistress. While there, the encampment is attacked by the plotters, and Barthampton is killed by Lane while threatening Muriel. Lizette is mortally wounded and dies after explaining she had no affair with Lane.