In a lonely mining camp near the desert mountains, two men descend into the depths of the earth, where an ordinary shift takes a startling turn. Rumblings from below disturb both ground and spirit, and something vast and hidden seems to stir beneath the mine's black tunnels. Through the eyes of the narrator, the tale captures a fleeting glimpse of the unknown-an atmosphere of awe and dread that hints at powers far older than human endeavor.