Favored by the former emperor, Princess Chen Lang Yue was allowed to grow up free and unrestrained despite living within the confines of the palace. She is not only a stunning beauty but also proficient in everything from poetry to music. Filled with a thirst for knowledge, Chen Lang Yue who is buoyed by her interest in construction sneaks out of the palace to join a team of craftsmen. Li Qing Feng formed the Muyu team with his childhood friend Luo Ye. Luo Qing Feng is a genius in architecture. He comes from an aristocratic family. However, he is insecure about his status as an illegitimate son. Together, eight young individuals with different personalities collaborate to build an interesting architecture.

This work is composed of six stories, namely "New Year's Eve Dinner", "Youth Prosperity", "Very Summer", "Longing", "Youth Forever", "Laiwan Duck Blood Fan Soup", the overall name is " "The Agreement", which means that "building a well-off society in all respects by 2020" is a happy agreement between the party, the country and the people. 　　 In the context of this big "appointment", each story is composed of a series of small agreements. Some of these agreements are with the protagonist and himself, some with old friends, some with his family, and even with strangers. The six stories emotionally involve family affection, love, and friendship; the protagonist's age ranges from teenagers to old age; the regions range from urban to rural areas, from farmers to workers, to white-collar elites. "Promise" uses a rich perspective to show that people are fulfilling their "promise" happiness with themselves, with others, and with the country.