The story takes place in an ordinary courtyard house in Beijing, where several families with different personalities live. The protagonist Lin Yu, a young man who traveled through time with modern memories, started a unique life in this era of scarce supplies but complex human relationships. In the courtyard, there are the eldest son Yi Zhonghai, who appears to be fair but hides his selfishness, and the idiot He Yuzhu, who is an excellent cook but is helpless by others. Qin Huairu's shrewdness and hardship, and Xu Damao's acrimony, all make this courtyard full of contradictions and disputes. Lin Yu relied on modern knowledge and wisdom to gain a foothold in the courtyard. He helped his neighbors solve problems, battled wits and courage with everyone, and at the same time worked hard to pursue his own ideals. In the process, he gained true love, and together with the people of the Siheyuan, he composed a song of life full of laughter and tears, struggle and tenderness over the years, and witnessed the rise and fall of the Siheyuan in the changing times.
