As a doctoral student in geology, Qingmuguo was entrusted by his tutor Pei Fengliang to explore the northwest mining areas. The train received a call from Professor Pei warning of bad weather, and then the train encountered an accident in a strange tunnel. After arriving, she met the erratic guides Hu Si and Li Ergou, and was taken into the underground mine to find the senior guide Huang Desheng. In the mine, the words and deeds of the three people became increasingly suspicious. Qing Muyao discovered that they were actually the victims of the exploration team in 1993, and became gatekeepers due to the mutation of the altar. Qingmuyao gradually realized that he had also died in the train accident and was trapped at the junction of life and death...
Purpose: Face the shadows and harsh environment of the past, find belonging and revenge through mutual support and healing, and ultimately achieve spiritual rebirth and reunion.