En garde! Prepare for more pulse-pounding thrills, more breathtaking action and more high-stakes heroism. The gallivanting royal bodyguards for King Louis XIII - Athos (Tom Burke, "The Hour"), Aramis (Santiago Cabrera, "Heroes"), Porthos (Howard Charles, "&Me") and d'Artagnan (Luke Pasqualino, "Skins") - are back for love, honor and adventure. Together, the inseparable Musketeers employ their bravery and skill to track down a missing Musketeer; become embroiled in a full-scale riot orchestrated by a notorious criminal mastermind; and embark on a dangerous mission to Le Havre. It's all for one in the non-stop second season of "The Musketeers".