In this sprawling mystery story blending Cthulhu lore with transmigration, the protagonist, Gu Mo, is a modern forensic pathologist well versed in Cthulhu culture. His soul transmigrates to a fog-shrouded city in another world. The city seems peaceful on the surface, but shadows of the Great Old Ones and Outer Gods have already seeped into it. Gu Mo works as a forensic pathologist, but a series of bizarre corpses marked with mysterious symbols shatters the calm. As he pursues the truth, he is obstructed by indescribable horrors and fanatics who seek to stop him from deciphering the prophecy behind the symbols. Meanwhile, Gu Mo's identity as a transmigrator and his knowledge of Cthulhu mythology are deadly secrets. If exposed, they will bring a manhunt and plunge the world into crisis. He faces a difficult choice: should he quickly acquire forbidden knowledge and grow stronger to fight the horrors, or hold fast to his principles and protect his mind from corruption? Gu Mo's weakness is his limited understanding of Cthulhu's powers, which hinders his combat and judgment. Fear also constrains his investigations, and the locals misunderstand him. Every victory comes at the cost of sacrifice and sanity. With the world under threat of a countdown to complete corruption by Cthulhu's power, Gu Mo must use his forensic skills and knowledge of Cthulhu mythology to overcome the obstacles in this hostile environment, solve the mysteries, and prevent the world's downfall.
