Li Chuyao (played by Sun Yi) was born in an ordinary family. She has a lovely brother Chuchen, and the two siblings have a very good relationship. But Chuchen suffered a fire at home after winning the 3,000-meter long-distance running championship and died. Li's mother became crazy because of this, and finally mistook Li Luoshu (played by Bai Jingting) who followed Chuyao home as Li Chuchen. Chuchen's good friend Li Luoshu entered the Li family as Chuchen to take care of the Li family. With the comfort of Li Luoshu, Li's mother's condition gradually stabilized. Chuyao also faced the future with the company of her "brother" Li Luoshu. Han Zimo's following made Chuyao taste the taste of love. When she made up her mind to hold hands with him and fall in love, the sudden change of the Han family caused Chuyao to be betrayed by her beloved, and what was left to her as a fiancee was a lot of debt. Li Luoshu was severely injured by the debt collectors to protect Chuyao. In order to heal her seriously injured and disabled brother, she was strong and brave, took on everything, and went through the darkest and most helpless days. Han Zimo, who had abandoned her, appeared in her life again. This time, she fell in love with Li Luoshu, who had always been by her side, without hesitation. However, they could not escape the bondage of responsibility and had to separate.