Drawn by tales of immense riches, Cid Kagenou accompanies his sister, Claire, to the notorious Lawless City. This lawless territory is governed by three rulers: Yukime, the Spirit Fox; Juggernaut, the Tyrant; and Elisabeth, a dormant progenitor vampire known as the Blood Queen. For Claire, hunting Elisabeth offers the ideal chance to demonstrate her true capabilities. Cid, however, has other plans: he aims to slip away from Claire’s watchful eye, gather as much treasure as possible, and time Shadow’s magnificent appearance for maximum effect.
With Elisabeth’s awakening approaching, her subordinate Crimson executes a deceitful scheme that plunges the town into chaos. While Claire searches for her missing brother, she finds an unlikely partner in Mary, a vampire hunter, and together they rush to the Crimson Tower, the lair of the Blood Queen. Simultaneously, Beta and a small group of Shadow Garden recruits reach the Lawless City. As the central figures gather at the Crimson Tower, the stage is set for a major showdown beneath the crimson moon.