The story takes place in an old alley in Beijing. The half-sisters Guan Xiaoyu and Guan Linxue have completely different personalities and attitudes towards life. A series of stories full of trivial matters, emotional entanglements and love choices occurred between them and their neighbor Su Xiaoying and Su Xiaoying's brother Su Jiabao. In the small world full of fireworks in the hutong, the three people have their own dreams and worries, love and family affection intertwined with each other. In the stumbling and noisy life, they write the various aspects of urban citizen life that belong to them. During this period, many hilarious and emotional things happened. In the end, each of them found their own happy destination, which also made the friendship between neighbors in the hutong deeper.