A new generation of musketeer guards, the young blades, emerge, following in the footsteps of legendary D'Artagnan and his mentors. The group consists of D'Artagnan's erudite inventor son, Siroc, romantic and poetic Spaniard Ramon, and Jaqueline, a late musketeer's daughter who disguises herself as her imaginary brother Jacques to seek revenge and glory.

A devastating blow strikes Jaqueline when Cardinal Mazarin's men brutally kil...