Tom Wayne (John Wayne) is a fugitive from justice, framed for a murder he did not commit. El Shaitan, the mysterious and diabolical leader of the Devil's Circle, a group who are plotting an Arab rebellion against the Foreign Legion, is to blame. It's up to Tom's sweetheart Elaine (Ruth Hall) and the trustworthy Three Musketeers - Clancy (Jack Mulhall), Renard (Raymond Hatton) and Schmidt (Francis X. Bushman Jr.) - to put an end to his reign of terror and clear Tom's name. Tom and The Three Musketeers narrowly escape death in episode after episode as they saddle up for a Sahara thrill ride in the name of truth, justice and brotherhood!