The young, idealistic D'Artagnan is skilled with a sword and dreams of becoming a member of the famous Musketeers. He sets off for Paris and soon manages to prove his abilities and win the trust of the three Musketeers, Athos, Porthos, and Aramis. Together, they uncover a devious plan by the powerful Cardinal Richelieu, who wants to plunge France into war with England and bring down the king.