In neon-lit City, two rival factions wage secret supernatural wars: the Exorcist Knight Order and the Ashen Shadow Cult, marked by burning flame tattoos called Ember Mark. Cullen Gu, the cult’s Right Apostle, carries a fatal Soul-Erosion Curse that devours his life. Ordered to steal a sacred spirit codex, he infiltrates the Order and crosses paths with Willis Voss, its sharp, grief-stricken chief exorcist. Unexpected sparks ignite between them, yet Cullen’s mission forces a devastating betrayal. Willis soon uncovers a buried secret linking them from a decade ago. To ease Cullen’s agonizing curse, he risks spirit resonance, a forbidden bond that costs him precious family memories. Plagued by vengeful cult apostle Vesper, who resents all loyal bonds, the pair are trapped between hatred, fate and a cruel magical price they cannot escape.
