The novel is set in 1660s France, ten years after the events of "Twenty Years After," and continues the story of the musketeers and their adventures. The novel follows the political intrigues of the French court, with a focus on the power struggles between King Louis XIV and his brother, Philippe, who is secretly being kept in prison. The musketeers find themselves caught up in this conflict, with d'Artagnan acting as a loyal servant to the king while his friends Athos, Porthos, and Aramis support the imprisoned Philippe. The story is full of swashbuckling action, intrigue, and romance, and features some of Dumas's most memorable characters, including the scheming Milady de Winter and the charismatic, mysterious Rochefort. Like the other books in the "d'Artagnan Romances" series, "Ten Years Later" is a richly detailed and thrilling adventure story, full of historical detail, humor, and suspense. The novel continues the story of the musketeers and their exploits, and remains a classic of adventure literature to this day.