The film "Safe and Sound" starts with a weekly piano class at the ward school, telling the story of several little assistant teachers with different personalities and their families' different life experiences and changes in fate. After a few years of bone marrow transplantation, the protagonists Haoxin and Qinxin choose to leave Yanjiao, where they have lived for many years, return to their unfamiliar hometown to start a new life, and return to campus.The film focuses on the daily life of themselves and their fellow leukemia patients before they left Yanjiao."Returning to Hometown for School" often means "Pressure" and "Confusion" for them. After experiencing multiple "Separations", the"Future"seemed so uncertain to them.