Tang Wan, who suddenly returned to China due to a broken love, reunited with her high school "Gang of Five" friends, but she found that everyone was experiencing helplessness and problems brought about by life and relationships in the adult world, and thus they were no longer as carefree as they once were. After the reunion, the five people accompanied each other and found their former selves. Some youthful regrets also slowly surfaced...
Concept: The regrets of youth are often the medicine that heals the soul.