El examen "gaokao" paraliza a todo el país. Para casi diez millones de estudiantes, este examen para entrar en el programa nacional de estudios determinará su vida. Nian ha estado muy ocupada preparando el examen, dejando todo de lado, aunque una compañera de clase se ha suicidado y ella misma ha sufrido bullying. Nian conocerá en esos días a un delincuente de poca monta con el que hará un pacto.
Li Jie, a lawyer, is taking divorce proceedings to try to get custody of her daughter. As she is working hard to earn a better life for her daughter, she hires a baby sitter, Sun Fang, to watch her child. One day, Li comes home only to find her child and Sun have disappeared. Unfortunately, Li is suspected by both her family and the police, and must lean on herself to trace Sun alone.
