Aristide, Léandre, and Perrin pledge only three loyalties in life: their king, their captain, and their passion for each other. So when the musketeers discover a plan to accuse M. de Tréville of treason, their reactions vary from the desire to kill the messenger, Benoît, to the need to unmask the man behind the plot to discredit their captain. The first two suspects, the English ambassador and Cardinal Richelieu, prove to be innocent, and the musketeers are forced to delve deeper into the inner machinations of the French court.

Meanwhile Aristide finds himself falling in love with that fated messenger, a blacksmith without a home who rouses all of his protective, possessive instincts. Benoît, however, has no interest in any man. Torn between desire and duty, Aristide must find a way to protect the king, clear his captain's name, and save his friends - all while heeding the demands of his heart.