Two years ago, the sudden murder of Li Jiahe's mother caused her and her father's life to deviate from the normal track. The relationship between her father and her daughter is in crisis as Jiahe is alienated from her father and resists communicating with him. Her father, who retired from the wrestling team, is unskilled and earns a meager living by delivering beef to the slaughterhouse. His humbleness humiliates Jiahe in front of her classmates, and this young girl, who has no one to rely on, gradually develops her own way of doing things - to fight back in the face of all the injustices and humiliations, no matter in what way they come her way. - Fight back, in whatever way possible. The summer before Li Jiahe's 14th birthday becomes even more anxious with the appearance of Yu Ran, who has returned from the reformatory school. As she gets closer to Yu Radium, her heart continues to change. How to deal with this teenager who is directly related to her mother's death, Jiahe is caught in an unprecedented dilemma...