Three years ago, Wen Zhi left Beijing due to a misunderstanding, gave birth to her daughter alone in Nancheng, and ran a steamed bun shop. By chance, Lu Wenjing finally found her and discovered the existence of his daughter. To make up for the lost time, he stayed at the small shop, from kneading dough and collecting money to taking care of the child, striving to become a qualified "internship dad." As the truth of back then is uncovered, can the two put aside their estrangement and become a family again?