An old man came to seek the help of Mr. Wu and his three companions with a mysterious incident that occurred in the southwestern mountainous area. Mist rises in the mountains, villagers disappear, and everyone pursues strange things to the abandoned black gold mine in the mountainous area, discovering that all the strangeness comes from the sourceAfter experiencing numerous crises, the mysterious creatures deep in the mine not only dismantled the old man's conspiracy, but also successfully solved the problem of fog.