Jian Yan, a modern soul from the dark Cthulhu culture, traveled to a different world city shrouded in fog all year round. This city seemed peaceful, but in fact it had been infiltrated by the shadow of Cthulhu. Jian Yan relied on his unique forensic perspective to get involved in a series of bizarre cases. In order to protect the secrets of Cthulhu, fanatic believers obstructed his investigation at every turn. As the investigation progresses and the case becomes more complicated, his sanity (SAN value) is also constantly consumed. Time is running out. Once the SAN value reaches zero, he will fall into madness. At the same time, because of his knowledge of Cthulhu, he was misunderstood by local forces as a madman and was not trusted. However, Jian Yan relied on his understanding of the Cthulhu mythology to save himself from danger after crisis. However, even if the truth is eventually revealed, he may be unable to return to a normal life because of his damaged sanity. Under heavy pressure, can Jian Yan break through the fog before his sanity is eroded, uncover the huge conspiracy hidden behind the case, save the city, and at the same time protect himself...
