A visit to the photographer's returns the physical looks of a 70-year-old grandmother back to her 20s. Things get even stranger when his grandson asks her to join his band, and his best friend begins to fall for her.

The film tells three stories about young people during different periods of Chinese history: the development of the Great Northern Wilderness, the Large-scale Development of Western Chinese, and the new era of socialism. Countless young people, filled with passion, integrated their personal ideals into the current of the times and composed a song of youth. Through the ordinary stories of young people, the film depicts the great development of the times and showcases the patriotic spirit of generations of young people.