28-Year-old Su Wan met Lin Yang, an 18-year-old boy who was in trouble on a rainy night, and helped him transition from studies to society in the name of "investment". In the past ten years, the young man has grown from an admirer to a person who can stand side by side, using his persistence to break through the defenses she built due to the age gap. From the dim light of the old alley to the warm sunshine of the family, they transcended the worldly vision and the gap of time, and turned a bond that began with goodwill into a long-lasting relationship. In the end, they, who are ten years apart, proved over the years that love has nothing to do with age, it is only about "when I run towards you, you happen to be waiting too."