In this long suspense story that combines Cthulhu and time-travel elements, the protagonist Gu Mo, a modern forensic doctor who is well versed in Cthulhu culture, travels with his soul to a different world city shrouded in fog. The seemingly peaceful city has actually been infiltrated by the shadows of the Old Ones and Outer Gods. Gumo works as a forensic doctor on a daily basis, but his peace is broken by the appearance of strange corpses with mysterious symbols one after another. In his pursuit of the truth, he is hindered by unspeakable horrors and fanatical believers who try to prevent him from deciphering the prophecies behind the mysterious symbols. At the same time, Gumo's identity as a time traveler and his understanding of the Cthulhu mythology are a deadly secret. Once exposed, it will trigger a hunt and a world crisis. He faces a dilemma, whether to quickly acquire forbidden knowledge and become stronger to fight against terror, or to stick to the bottom line and not be eroded by his mind. The shortcomings of Gumo's abilities lie in his insufficient understanding of Cthulhu's power, which affects combat and judgment. He is also in a fearful environment, and his investigation actions are limited. He was misunderstood by the natives, and every victory was accompanied by sacrifice and loss of sanity. Under the countdown threat of the world being completely eroded by the power of Cthulhu, Gumo must rely on his forensic skills and understanding of the Cthulhu mythology to break through obstacles in a harsh environment, solve mysteries, and prevent the world from falling.
