In 1997, Li Yongjiu (played by Liu Chenglong), a mentally retarded man with an IQ of only 6 years old, and his lovely daughter Ye Sheng (played by Ge Suyuan) depended on each other. Although their lives were simple and poor, they were full of happiness. One day, Long Jiu, who was obsessed with buying a Sailor Moon schoolbag for his daughter, was accidentally involved in a kidnapping, rape and murder case, and the deceased...