D'Artagnan
Radegonde / Anne
Athos
Porthos
Aramis
Louis XIII
Cardinal Richelieu
Françoise
Daughter
Marie de Médicis
Wife
Young Blades follows D'Artagnan (Hugh Dancy), a young arrogant swordsman; Radegonde (Sarah-Jane Potts), a clever girl he meets in the woods; and a trio of Musketeers as they attempt to thwart a plot to send France and Spain into war.