D'Artagnan is forced to join forces with Milady to save Constance, who was kidnapped before his eyes. But as war is declared and Athos, Porthos and Aramis have already joined the front, a secret from the past shatters old alliances.

Director: Martin Bourboulon

Cast: François Civil, Vincent Cassel, Romain Duris, Pio Marmaï, Eva Green, Louis Garrel, Vicky Krieps, Lyna Khoudri, Jacob Fortune-Lloyd, Eric Ruf, Marc Barbé, Patrick Mille, Julien Frison, Ralph Amoussou, Camille Rutherford, Ivan Franek, Gabriel Almaer, Thibault Vinçon