Su Mo, a girl with a cold and stoic personality, lives in a remote and isolated Huaishu Street. A small rice noodle shop maintains the livelihood of her uncle, mother, two younger brothers, and her family of five. Su Mo knew that the only way to get rid of this poor and hard life was to study, so she devoted all her energy to studying and used today's hardships to gamble on tomorrow's happiness.
This quiet private bookstore is where Su Mo temporarily escapes from reality. The appearance of Xu Mu Shen, the son of the bookstore owner, caused cracks in Su Mo's silent and hard shell. This young man was bright, simple, and childlike, which made Su Mo coldly reject him and at the same time be moved by his efforts. When Su Mo was struggling desperately in her troubled youth, Xu Mu Shen stood by and used his immature arms to hold up the sky of her dreams.
However, the impermanence of reality and fate makes two people who are in love miss each other time and time again. Many years later, Su Mo finally summoned up all the courage and headed in the direction of Xu Mu Shen. He came to Prague alone, known as the "City of Love". Will the boy in the dream still stay where he is?