The Captain of the Cardinal's guards just so happens to be a former Musketeer. However, Rochefort was cast out as a King's guard for conduct unbecoming, and more specifically for leading a fellow Musketeer into a trap, resulting in the guard's death. That unfortunate guard was the father of D'Artagnan, a young boy who has grown up to become highly-athletic and skilled man who wishes to become a Musketeer like his father. Such romanticism would make Rochefort's stomach turn.
Rochefort now carries the rank of Captain and he serves as the right-hand man of the religious leader of France, Cardinal Richelieu Rochefort's latest assignment is to notify the King's guards that they are no longer needed, and it is a task that gives him great pleasure. With his gravelly voice and snarl of a grin, he orders the Musketeers to disperse or be arrested. Upon their return to France, the Three Musketeers who weren't there to hear it personally - Aramis, Athos, and Porthos - decide to make a stand for what they believe in. They are joined by the young man who came to the Musketeers looking to become one: D'Artagnan.
Captain Rochefort easily takes down the wild D'Artagnan and arrests him. The Cardinal gleefully reports to the young prisoner that the Musketeers are no more and orders him to death. When the Three Musketeers rescue their young prodigy, Rochefort and his guard begin their pursuit. In the meantime, however, D'Artagnan has learned of the Cardinal's plans to unite with England and steal power from the King. Rochefort is now tasked to find the Musketeers and D'Artagnan not just to avoid embarassment, but to avoid an all-out political disaster for his boss, the Cardinal.
As the Cardinal's political plans with England are scuttled, Rochefort returns to France to protect the Cardinal and his other plans: to assassinate the King. The Musketeers reunite to storm the castle and capture the Cardinal without harm to the King. Meanwhile, Rochefort finds himself in a duel with young D'Artagnan, and before he offs the young man, he reveals the truth about the boy's father: it was he who killed his father. Rochefort is prepared to deliver the final blow when he is foiled by love. The Queen's maiden Constance is able to deliver a sword back into D'Artagnan's hands before being struck, and he thrusts it into his black heart. Rochefort dies in the line of duty, much like the man he murdered years ago. This time, however, justice is done.