15-Year-old Wen Zhi suffers from severe thalassemia. In order not to hinder her brother from taking the college entrance examination for the third time, her parents sent her to her grandmother's house in the countryside overnight when she became ill. "Brother is also a human being and has his own future." She resisted the discomfort and replied to her brother's message with a smile. But no one knew that she never completed the blood transfusion - her mother was in a trance and misremembered the incident. Three days later, her family came to take her home. What was waiting for her was her already cold body. Her brother was admitted to the best university, but he forgot her forever. I would only buy a windmill for no reason on a rainy day and mutter to myself that she would be safe. "