Fang Ling's parents went to the UK because of job transfers. They have been working in the UK in recent years. Before leaving, because they were worried that Fang Ling was at home alone, they entrusted Fang's father's friend Song An and went through the transfer procedures, asking Fang Ling to go to Heling No. 1 Middle School to study in Heling City for the second year of high school, and Fang Ling felt something was wrong...