Simon lives in a cavern village where he drills holes to expand his stifling little world. Then he finds a small glowing drill-bit and the man-sized mecha it activates. Before he can react, Simon is dragged into a plot to break through to the surface by Kamina, a local gang leader. Kamina and the cowardly Simon soon find themselves defending their village, but what awaits the duo when they reach the surface?
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