The story takes place in the modern city of Jiangcheng. The world seems peaceful, but in fact there is an undercurrent. Ancient "gods" (not gods in the traditional sense, but weird beings from other dimensions who feed on human emotions and souls) have been trying to erode reality. A line of "Night Watchmen" has been fighting against it for generations. They hide in every corner of society and use various identities as cover. Qingshan Mental Hospital is a stronghold in Jiangcheng that suppresses an important "god ruin" (the node where gods invade). Lin Ye stationed here as a patient, which was both disguise and suppression.
