Taizo Hori, an industrious underground laborer, descends into the depths of the earth where he confronts a peculiar infestation of burrowing creatures. Armed with his wits and determination, he must navigate through the soil, carving passages as he searches out and neutralizes the monsters that lurk beneath the surface. The fate of the underground realm rests on his ability to outmaneuver these subterranean threats and reclaim the tunnels from their grasp.