Cheng Yihui, a senior high school boy, was admitted to the hospital due to illness. He accidentally met Qiu Ling, a girl in his class, and learned the secret that she had been seriously ill for a long time, which helped her untie the knot that Qiu Ling had caused by her illness.During their hospitalization, Cheng Yihui and Qiu Ling met young people with serious illnesses such as Tie Yi, Liao Tianran, and Li Ye, and gradually established a deep friendship with them.The mutual understanding and support between doctors, parents, and children not only dilutes the anxiety and fear caused by illness, but also brings new hope to life.