Creatures of will and temper

In Victorian London, fencer Evadne Gray finds her life upended when her sister Dorina falls under the sway of Lady Henrietta Wotton, a seemingly respectable aristocrat secretly bound to a demon. Evadne's pursuit of fencing leads her to George, a master dedicated to eradicating demons, who enlists her help. As Evadne delves deeper into this hidden world, she suspects Lady Henry is a diabolist and fears Dorina has joined her, leading to an adventure of swordplay, high society, and dark secrets.