D'Artagnan, on a quest to rescue the abducted Constance, runs into the mysterious Milady de Winter again. The tension between the Catholics and the Protestants finally escalates, as the king declares war — forcing the now four musketeers into battle. But as the war goes on, they are tested physically, mentally and emotionally.
D'Artagnan, a spirited young Gascon, is left for dead after trying to save a noblewoman from being kidnapped. Once in Paris, he tries by all means to find his attackers, unaware that his quest will lead him to the very heart of a war where the future of France is at stake. Aided by King's Musketeers Athos, Porthos and Aramis, he faces the machinations of villainous Cardinal Richelieu and Milady de Winter, while falling in love with Constance, the Queen's confidante.
It's 1649: Mazarin hires the impoverished D'Artagnan to find the other musketeers: Cromwell has overthrown the English king, so Mazarin fears revolt, particularly from the popular Beaufort. Porthos, bored with riches and wanting a title, signs on, but Aramis, an abbé, and Athos, a brawler raising an intellectual son, assist Beaufort in secret. When they fail to halt Beaufort's escape from prison, the musketeers are expendable, and Mazarin sends them to London to rescue Charles I. They are also pursued by Justine, the avenging daughter of Milady de Winter, their enemy 20 years ago. They must escape England, avoid Justine, serve the Queen, and secure Beauford's political reforms.
Three cowboys carry on like sagebrush swashbucklers.
Young d'Artagnan proves his worth and teams up with three of the finest musketeers to save the Queen of France.