Athos, Porthos and D'Artagnan are fighting on the battlefront while Aramis has trouble living in contemplation as a monk. The Musketeers' search for missing gunpowder lead them to follow bandits to Aramis' monastery, where circumstance force them to collaborate to save the monastery's children and brothers. Aramis' finally accepts his true calling as a Musketeer and rejoins his brothers-in-arms in Paris.
Elenco: Luke Pasqualino , Santiago Cabrera , Tom Burke , Howard Charles , Ryan Gage , Hugo Speer , Tamla Kari , Alexandra Dowling , Maimie McCoy .