Ruth Rutherford, crippled as a result of being thrown from a horse, breaks her engagement to Lord Wallington. Dejected, he returns to his regiment in Egypt and sinks into dissipation. Ruth hears of his plight and also goes to Egypt, where she meets Dr. Mohammed Ali. Ali cures her lameness in return for Ruth's agreeing to become his wife, but Biskra, Ruth's servant, kills Ali before he can collect. Even from death Ali's power over Ruth returns her to her wheelchair until she jumps up to save Wallington from an attack feigned by Biskra.

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