Many years ago, three corpses were found in Xi Qiao's school, and Xi Qiao became the reporter of a murder. When people were panicking, her friend committed suicide and died. She left here with her mother. Many years later, she became a psychology teacher at this school. Although she didn't want to touch this past, things developed in a weird direction. After she found her friend's diary, she would go back to the high school days before everything happened...
Concept: People who look sunny on the outside are scarred on the inside