A world-weary, widowed police inspector has to break his vow of self-isolation and get back on the field after his teen daughter is arrested for the possession of a gun tied to a much-publicized murder.

In 17th-century France, the Queen brings the Three Musketeers — Athos, Porthos, Aramis, and an aging d'Artagnan — back from retirement for one last job: saving her son Louis and the whole kingdom.