Leaving his country village, D’Artagnan (Douglas Fairbanks) heads to Paris in hopes of becoming a musketeer. Soon after, he meets three of them — Athos (Leon Barry), Porthos (George Siegmann) and Aramis (Eugene Pallette) — and joins their struggle to defend Queen Anne (Mary MacLaren) against the devious Cardinal Richelieu (Nigel De Brulier).