Meet Ciaran Noyce, the calm yet deadly deputy commander of the Aegis, an elite knight order serving the Queen and protecting the world from supernatural threats. Hailing from a family of demon hunters in the capital of Jalheim, Ciaran hides a fatal secret: a demon lodged in his heart since childhood is slowly waking, ready to consume him.

This secret is uncovered by Hedworth, Duke of Kerningshire—brilliant, unhinged, and infamous for his warped sense of curiosity. Instead of turning away, Hedworth becomes obsessively determined to keep Ciaran alive. As the two work through a string of eerie and perplexing cases—haunted by tragic pasts, strange symbols, and a melancholy, fairy-tale beauty—their dynamic begins to shift. Ciaran’s gentleness and resilience cut through Hedworth’s cruelty, while Hedworth’s ruthlessness bends, inch by inch, into reluctant care.

Under the backdrop of gothic castles and moonlit memories, case by case, fear by fascination, the knight and the duke move from wary allies to something deeper—each becoming the other’s unlikely salvation.