Li Er, a 17 year old girl who has great difficulty hearing out of her left ear, is rejected after confessing her love to a boy, Xu yi. Instead the boy is in love with Li Bala, a girl who is in fact in love with Zhang Yang. Li Er befriends Li Bala, who dies due to an accident. As the movie progresses, Li Er overcomes her hatred of Zhang Yang, whom she blamed for Li Bala's death.

The film is based on a true story, inspired by the touching real-life events of the 1993 (01) class of the Fruit Tree Department at Hebei Agricultural University, whose students took care of their late classmate’s parents for 15 years. After the sudden passing of Li Baoyang in his youth due to illness, his classmates—unrelated by blood but bound by love—make a lasting promise to honor his memory ...

Li Er, a 17 year old girl who has great difficulty hearing out of her left ear, is rejected after confessing her love to a boy, Xu yi. Instead the boy is in love with Li Bala, a girl who is in fact in love with Zhang Yang. Li Er befriends Li Bala, who dies due to an accident. As the movie progresses, Li Er overcomes her hatred of Zhang Yang, whom she blamed for Li Bala's death.