One for all and all for one in this action-packed serial adaptation of Alexander Dumas' <i>The Three Musketeers</i>. 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.