Whilst remembering the fallen, the Musketeers face an explosive showdown.
In the wake of a devastating tragedy, Grimaud declares war on the Musketeers, starting with the people they love. Still blinded by grief, will the Musketeers see him coming before it's too late? With personal stakes at an all-time high, the Musketeers and their supporters must fight to defend a city on the brink of destruction against their most relentless enemy yet. The battle takes them to the depths of Paris, where Grimaud tests Athos's resolve to the limit.