In the early 17th century, King Louis XIV of France is determined to rule with absolute authority. However, he faces a challenge in the form of his identical twin brother, Philippe, who was separated from him at birth due to the fact that only one son can inherit the throne. As the years pass, Louis becomes increasingly paranoid and orders his trusted advisor, Cardinal Mazarin, to keep Philippe imprisoned away from public view. Meanwhile, three aging Musketeers - Athos, Porthos, and Aramis - are living in exile after being forced into retirement by King Louis XIV. They are approached by a mysterious woman who claims that Philippe is still alive and being held captive in the Bastille prison. The Musketeers agree to help her and learn that Philippe has been imprisoned for over 20 years. As they devise a plan to rescue Philippe, the Musketeers must navigate the treacherous waters of court politics and confront their own personal demons. They also encounter a young and ambitious Musketeer named D'Artagnan, who becomes entangled in their quest. When the Musketeers finally infiltrate the Bastille and free Philippe, they are met with unexpected challenges. It turns out that Philippe is not just any ordinary prisoner; he is actually King Louis XIV's identical twin brother, and his release threatens to upend the entire French monarchy. As tensions escalate, the Musketeers find themselves caught in a web of intrigue and deception. They must use all their wits and cunning to help Philippe reclaim his rightful place on the throne and bring about a new era of peace and prosperity to France.