The Good Traitor (S02E03)

The Musketeers find themselves embroiled in a dangerous mission when they agree to save the daughter of a rival. In return for her safe return, they seek a volatile gunpowder formula that could shift the balance of power. As they navigate treacherous territory and face formidable foes, the stakes rise, testing their loyalties and courage. With time running out, they must outsmart their enemies to secure both the girl and the explosive secret before it falls into the wrong hands.