In the continent of Tarantis, where steam and spells intertwine, the pharmacist Thane Blackthorn, whose memory has been erased for twenty years, lives in the slums by selling poison-laced potions. When he saw the image of himself poisoning the cardinal in the eyes of a scorched corpse executed by the church, the sealed shadow bloodline began to awaken.
In order to trace the source of the black thorn potion that caused memory loss, Thane had to compete with the demon-hunting nuns of the Eternal Holy See, the prosthetic transformers of the Machinery Alliance, and the ghost intelligence dealer who sold his memory fragments. All clues point to the heart of the first Dragon King buried deep underground - the immortal engine that can rewrite the rules of the world, which is being slowly corroded by the poison created by Thane three years ago.
When the eyes of the raven reflect the death countdown of the entire continent, he must make a choice: use the bloodline of Darkness to devour the eternal engine and become a new god, or detonate the black thorn potion in his body and die with all the manipulators who tamper with memories.
