A young King Louis XIV (Leonardo DiCaprio) is hateful, spiteful, and self-gratifying. His subjects hate him. Another young man (DiCaprio) lives in a prison and wears an iron mask, completely hiding his face. Rumors spread that they are identical twin brothers, but the one who is king was born first. A band of musketeers, specifically the Three Musketeers, take it upon themselves to free the man in the iron mask and train him to replace the evil twin brother. Their plot is made all the more difficult because the man who protects the king is Aramis (Jeremy Irons) who was once one of the three. He is their brother in arms. He knows how they operate, yet he has sworn to duty and loyalty to his king. Will he side with his former comrades, or will he due his duty as a loyal servant of the king? How far with the others go to accomplish their goals? Is the man in the iron mask even up to the task of being king?