Du Mantang (played by He Bing), the alley housekeeper of the "Crotch Shaft Hutong", is a good man in the alley, and Zhang Zezhong (played by Yu Qian) on the other side of the door is flamboyant and loves to take advantage of small advantages. A reality show shooting made the resentment of the two explode, and in the subsequent inspection group inspection, the contradiction in the basement incident continued to escalate, and the two caused a series of ridiculous accidents in the battle of wits and courage again and again. By describing the joys, sorrows, and sorrows of ordinary residents in the hutongs, this play shows the moving moments of ordinary life of the people.