With Sooha now in Dardan’s clutches, her life is in grave danger! In order to save her, Heli and his friends investigate a bar called Railgun, where they’re ambushed by an enemy vampire with a strange power unlike anything they’ve encountered. Meanwhile, the werewolves learn that Sooha’s kidnapping and the disappearance of their brothers are linked—and all roads lead to the vampire-infested city of Automnal! When friend turns to foe, the boys may have to call upon their past selves to awaken their true power—but will that be enough to rescue Sooha before it’s too late?