Lucien sets out to kill the Musketeers before they interfere further in his plans. He launches an attack on Athos and sets a trap for Aramis, Porthos, and D'Artagnan. Meanwhile, Louis goes on a pilgrimage, while Feron is forced to choose sides.

Lucien abducts Aramis, who is secretly conducting peace negotiations for Anne with her brother Philip, as bait in a trap to kill the Musketeers. Meanwhile, Milady returns from England to be with Athos, and Sylvie is framed for crimes against the Crown.