In 1625 the hot-headed young Gascon d'Artagnan rides to Paris to join the King's Musketeers, and on his first day challenges three of them, Athos, Porthos and Aramis, to duels; they become his firm friends. Together they cross swords with Cardinal Richelieu's guards and spies, above all the beautiful, deadly Milady de Winter, to save the Queen's honour.