King's swordsman Captain Buridan, hero of the Flanders campaign, returns to Paris to find it in a grip of fear -a "vampire/witch" in the "Tower of Sin" is luring young men to their deaths by offering them a night of sexual ecstasy followed by savage slaughter: "You've had your fun -now its our turn!" Buridan is holding secrets of his own and his battle to save France from an evil Chancellor, an impotent King and a lascivious, wanton Queen make the battlefields of war seem like child's play. The killer may be a beautiful beast above the laws of man but finds she's not above poetic justice while the Musketeer saves the day for the French monarchy.