D'Artagnan (Logan Lerman) leaves his home in rural France to fulfill his ambition of becoming one of the king's elite guardsmen, the Musketeers. In Paris he meets Athos (Matthew MacFadyen), Porthos (Ray Stevenson) and Aramis (Luke Evans) -- three of the king's finest swordsmen, who have been laid low by Milady De Winter's (Milla Jovovich) betrayal. D'Artagnan rallies his new friends to foil Cardinal Richelieu's (Christoph Waltz) plot to overthrow the monarchy and crown himself king of France.