Chen Che doesn't know who his father was and the topic is a taboo in the Chen family. When an accident threw him back to 1989, a year before he was born, he gets a chance to find out himself. Before he could locate his mother, he first meets her best friend, Ye Zhen Zhen, a wholesome girl who helps him navigate the past while he helps her land big clients with his expert knowledge of stock market trend. Through her, he gets to know his younger, happier "mom" and the possible candidates for his father. He soon learns the reason his mother never talks about his father, and he is faced with a dilemma: He must choose between his mother's future and his very existence.