孤独的青年森文太郎在转学的第一天受到同班同学宫本的挑战而攀登校舍，只要踏错一步就有可能送命，但成功攀登的满足感让他首次感到“活着”，森文太郎攀登的热情开始加速涌现......

With only three weeks left in his three year contract, Sam Bell is getting anxious to finally return to Earth. He is the only occupant of a Moon-based manufacturing facility along with his computer and assistant, GERTY. When he has an accident however, he wakens to find that he is not alone.