Captain Treville dispatches the King's Regiment's finest musketeers, Athos, Porthos, and Aramis, to recover a lost musketeer carrying important letters on behalf of King Louis.
After organizing a full-fledged riot, Vadim intends to make life as difficult as possible for the authorities who have imprisoned him.
The Musketeers are sent to Le Havre to catch the well-known merchant trader and explorer Bonnaire and return him to Paris to be chastised for violating France's trade agreement.
Aramis' devotion to the Musketeer regiment is put to the test when he offers to assist an old friend in uncovering the true story behind a mission.
When Porthos is wrongfully accused of murder, he is forced to return to the potentially dangerous streets just as he was young. However, it is up to the remaining Musketeers to prove his innocence and save him.
As the King is unwillingly reunited with his banished treacherous mother, Marie de Medici, Aramis does everything he can to protect a young woman and her baby boy.
The musketeers have to rescue an aristocratic woman convicted of witchcraft, unbeknownst to them that an envoy is trying to stop them.
The King organizes a duel between the Musketeers and the Red Guards to determine which regiment is superior once and for all, allowing D'Artagnan the opportunity to prove himself.
The Musketeers are besieged in a convent while guarding the Queen after she is subjected to an assassination attempt.
An unexpected schism threatens to split the Musketeers. Will they be able to restore the damage, or will Milady be able to exact her last vengeance?