As D'Artagnan and his companions grapple with the uncertainty surrounding Madame Bonacieux’s kidnapping, the narrative shifts to a high-stakes confrontation at the cardinal's palace. The cardinal displays an unsettling omniscience, detailing D'Artagnan's history, including his "hometown," "family," and "adventure to England." The tension peaks when the cardinal notices the jewel given to D'Artagnan by a lady, a token that serves as a silent testament to his recent exploits. Despite being offered a promotion to become a "lieutenant in my guards," D'Artagnan exercises caution. He understands that the cardinal is "not to be trusted," choosing to prioritize his dream of becoming a musketeer over the immediate allure of political elevation. By refusing the offer, he inadvertently marks himself as a target, with the cardinal warning that "powerful enemies" will surely "destroy" him.
As the military campaign toward the "town of La Rochelle" begins, the atmosphere darkens with the presence of Milady. D'Artagnan, distracted by thoughts of Constance and the cardinal’s veiled threats, fails to notice that Milady is actively tracking him. The inevitable confrontation occurs when D'Artagnan is separated from his fellow musketeers. He is ambushed by two men in the forest, whom he swiftly disarms. Upon interrogation, the attacker reveals the hand behind the violence: "They call her milady." This confession exposes a sinister plot, confirming that Milady had hired these men not only to attack him but also to "carry off a young woman"—Constance—to a "convent in Bettine."
In a chilling turn of events, the conflict escalates from physical combat to psychological warfare. D'Artagnan receives a deceptive gift: a basket of fruit accompanied by a forged letter purportedly from Athos. The plot thickens when the musketeers arrive, and Athos clarifies, "I didn't send you anything." The gravity of the situation is realized when they find Brismont, who had consumed the fruit, "lying on the ground" and "very sick." It becomes clear that an assassination attempt was orchestrated, leaving the group to deduce that it was "either Milady or the Cardinal" behind the poison.
Facing the reality that they "can't go on with so many dangers around us," the musketeers formulate a definitive plan. Athos suggests turning the tables on Milady by leveraging her past as a "thief," threatening to expose her to the king unless she ceases her pursuit. This strategy aims to neutralize her influence through the threat of royal arrest. Meanwhile, the rescue of Constance remains the primary objective. Portos emphasizes the clarity of their path, noting that because Brismont revealed the location of the convent, they have a concrete destination. The group resolves to prioritize the battle at La Rochelle before embarking on the mission to "travel there and rescue her," setting the stage for a climactic showdown.