Set in the mysterious Northeast, this story blends local folk customs and legends of the immortals. Harbin is its central setting, with locations including a morgue, a fox spirit’s cave, and a military-industrial compound, creating a unique world where the supernatural and the everyday intertwine. Here, phenomena such as spirit mediums who serve the immortals and underworld messengers who travel between realms are real, colliding head-on with ordinary people’s lives and shaping a distinctive worldview.