The story begins in the 1960s, located in a military compound in a northern city, where military families from all over the world gather. Under the surging tide of the times, the children in the compound grew up together. Their families had not only the passion for national defense, but also the triviality and warmth of daily life. From the planned economy to reform and opening up, and then to the information age, the people of Dayuan have gone through countless changes, but they have always maintained the friendship between neighbors and their love for life.