D'Artagnan, on a quest to rescue the abducted Constance, runs into the mysterious Milady de Winter again. The tension between the Catholics and the Protestants finally escalates, as the king declares war — forcing the now four musketeers into battle. But as the war goes on, they are tested physically, mentally and emotionally.

Xue Fangfei, the daughter of a well-off county magistrate lost everything after a major upheaval. Saved by Jiang Li, the daughter of the Secretariat Director, she took on the identity of Jiang Li and returned to the capital. With the help of Duke Xiao Heng and others, she overcame numerous hardships, tirelessly fought against injustice, rescued her father who had been wrongly imprisoned, assisted Xiao Heng in upholding justice, protecting the common people, and ultimately regained a beautiful life.

D'Artagnan, a spirited young Gascon, is left for dead after trying to save a noblewoman from being kidnapped. Once in Paris, he tries by all means to find his attackers, unaware that his quest will lead him to the very heart of a war where the future of France is at stake. Aided by King's Musketeers Athos, Porthos and Aramis, he faces the machinations of villainous Cardinal Richelieu and Milady de Winter, while falling in love with Constance, the Queen's confidante.