Amid the shadowed depths of an underground realm, a prince chafes against his father's ban on swordplay, eager to claim his place among skilled fighters. The sudden ruin of a towering inscribed monolith has fractured the fragile peace with surface-dwelling humans, igniting endless accusations and a century of war that scatters its fragments below. Betrothed to a talented swordswoman who values his resolve yet longs for greater strength, he weighs personal ambition against royal duty as old enmities flare anew.