The Fighting Musketeers is a swashbuckler adventure set in 17th century France. It follows the story of three musketeers who fight against a powerful Catholic cardinal and his henchmen. The musketeers are sworn to protect their king and queen, as well as the honor and loyalty of France. Along the way, they encounter various obstacles and challenges, including sword fights, palace intrigues, and dangerous missions. Their friendship and courage are put to the test as they try to uncover a conspiracy and save the kingdom from the cardinal's evil plans. This period piece is filled with action, romance, and drama, showcasing the bravery and determination of the musketeers.

To avenge her defeat and with the help of the Cardinal's army leader Rochefort, the treacherous Milady de Winter kidnaps both D'Artagnan and Constance, in order to spur a war between the French and the English, as per the Cardinal's wish.