In this feature-length abridgment of the 1933 serial The Three Musketeers (1933), three Foreign Legionnaires (Clancy, Renard, and Schmidt) who refer to themselves in song and banter as the Three Musketeers fight renegade Arab forces under the mysterious El Shaitan. Rescued from a surrounding force by army pilot Tom Wayne, they support Wayne as he tries to uncover the identity of El Shaitan, who is smuggling guns into Algeria in hopes of creating a full-scale revolution. Only by going undercover as a member of the Devil's Circle can Wayne learn the secret of El Shaitan's identity.