故事发生在世界末日之后，绿树与湖海变成了漫天的黄沙与风雪，地球上的环境已不适合人与动物生存，剩下来的只有凄厉的怪兽和刺骨的严寒。 故事的主人公是一位老人，他是世界上仅存的人类，住在自己搭建的一个高塔上。每一天，老人要从高塔上下来，走很远的路获取一桶泥浆，然后艰难地通过过滤来饮用，而每个夜里，高塔便是他的栖身之所，容他藏身，给他安全。

 这一天，怪兽冲上了高塔，对他发起了凶猛的攻击，他只能拼尽最后一丝力气抵抗。当他失去了所有的武器以后，高塔也因承受不住一次又一次的攻击倒塌了……

After the end of the world, trees, lakes and oceans are taken place by rampant sand storm as well as ferocious snow. Human beings and animals all disappeared. What’s still alive are the tribe of dreadful monsters and the piercing cold. 

The very last human being in the world is an old man, whose life is hanging loosely on top of the tower in the air built by him. During the day, he has to climb all the way down to a very far place in order to get a bucket of water that looks like mud, which is then filtered for drinking; while at night, the tower in the air is his lonely hidden place, in which he’s supposed to be safe from the attack of those ferocious monsters.

But one day, the monsters climb up to the tower in the air and attacked him all of a sudden. The old man picks up his guns and shoots back to protect his life. At the moment when he losts all the weapons, the tower in the air collapses under the weight of the group of monsters.