Deep behind reality, every lonely soul seeks to take root, be stable, and realize dreams. Lu Xinghe, who thinks that he has been a mistake since birth, is in the process of growing up step by step, in a world that seems to be cold but not cold, tastes the warmth and coldness of the world, and his heart has changed from self-closed to bold and open, constantly knowing himself and changing himself. The so-called "gutter" is because there is always the sun behind to cheer and cheer up.