Lin Mo is an ordinary programmer. Less than a year after graduating from college, his former enthusiasm has been worn away by the daily grind. His life has been compressed into a tedious and monotonous routine between three points: his company, his rented apartment, and a coffee shop he frequents. He thought life would always be this way. Until one afternoon, when a mysterious young girl, whose appearance doesn't seem to match her age, bursts into his unchanging daily life. Because of a comical misunderstanding, he and the girl, named Su Youqing, cross paths. Lin Mo gradually discovers that this sharp-tongued, proud, and outwardly childish girl seems to be hiding many secrets that her appearance belies. For Lin Mo, who has long lost his motivation for change, will this encounter that began in a coffee shop be the opportunity he needs to break free from his dull life?