The play tells the story of the children of several craftsmen who restore cultural relics in the Forbidden City, including Shao Xue, Zheng Sunian, and Zhang Qi. They grew up together in the hutongs of Beijing, and experienced the SARS epidemic, the death of their elders, the demolition of the ancient city, and other ups and downs, and forged a deep friendship. As they grew up, they chose completely different paths due to their differences in personality. Influenced by Zheng Sunian's mother, Shao Xue was unwilling to give up the infinite possibilities of the future for love, and chose to go far away; Zheng Sunian inherited the will of his elders and became a cultural relic restorer, sensing time and gaining strength in immortal cultural relics; Zhang Qi was recommended in advance because of his mathematical talent. Even though they have a connection, the young Shao Xue and Zheng Sunian still parted ways because of their respective pursuits. After many years, they met again, and the seeds buried in their youth broke through the ground again...