princess hyejin is ruling over a kingdom, and allegedly gets assassinated, which prompts byulyi to take over—next to throne who's always had bad intentions. unknown to her, hyejin was never successfully killed, but instead, joins an underground rebellion lead by solar—a runaway from the slums that's been hiding her power over fire for most of her life. and wheein—byulyi's lady-in-waiting who's always looking for the right time to strike so they can overthrow byulyi and place hyejin back on the throne.