Cecilia awakens the legendary Seven-Flame Dragon Fire, an elemental sorcery capable of defending the realm, only for patriarchal edicts to bar women from ascending the Northern throne. When her brother suddenly perishes in battle and clerical tampering crowns an obscure commoner alchemist named Matthew instead, foreign armies breach the frontiers. To avert civil ruin, the bitter rivals agree to an arranged political union to stabilize the northern defenses.
Their royal wedding ceremony shatters into chaos when heavy enemy artillery obliterates the castle chapel. Forced onto the front lines together, Cecilia and Matthew must combine forbidden dragon flames with experimental alchemy to repel the siege, exposing the treasonous councilors who forged the succession treaties before their empire falls into ruin.
