Caleb is the discarded son of a declining house—weak, overlooked, and written off by all. But when his sister Elara faces death, he reveals a terrifying truth: he is the reincarnation of the Wraith King, the most powerful being in the Caelian Empire. As the traitorous Graves family and the ancient Fiendkin rise to shatter the centuries-old seal, Caleb must unite the rival Wraithmaster clans, command legendary spirits like the Twin Reapers, and ascend to the legendary Abyssal Sovereign realm...