Arthur has always been consumed by an obsession with the unseen — chasing scraps of forbidden lore across dusty forums and faded manuscripts. His search leads him to a mysterious grimoire bought in secret on the dark web, its pages whispering of seclusion, sacrifice, and the summoning of an ancient demon: Xathomet, the Servant of the Inverted Star.

What begins as curiosity soon becomes compulsion. Arthur's family recoils in horror, his friendships wither, and his own will falters as the voice of the demon coils tighter around his soul. In exchange for loyalty, Xathomet grants him rings of power and a retinue of shadowy servants. With their aid Arthur masters sorcery, wins a reputation as a healer, and bends sacred invocations to his own dark ends.

But every gift carries a cost. The demon's demands grow ever more terrible: blood, sacrifice, and submission. Drawn into secret brotherhoods and blasphemous rites, Arthur is forced to confront the abyss he once longed to peer into. His pursuit of forbidden knowledge becomes a descent into damnation — one that threatens not only his soul but all who cross his path.