The young Gascon D'Artagnan (Douglas Fairbanks) arrives in Paris, his heart set on joining the king's Musketeers. He is taken under the wings of three of the most respected and feared Musketeers, Porthos (George Siegmann), Aramis (Eugene Pallette), and Athos (Léon Bary). Together they fight to save France and the honor of a lady from the machinations of the powerful Cardinal Richelieu (Nigel De Brulier).