Bo discovered fire three caves back. He invented the stick, the toothbrush, knife, and fire ring. He just wants to be left alone to finish the comb. Beautiful unattached Dawn wants to move the village of two-dozen cave-dwellers out of the cave. "No cave is large enough." No one lives outside a cave where rain melts people, as anyone knows-they've seen it. But, it rains "out there" and rain melts people. Now that's a problem. Bo improves...