At the beginning of his second year of high school, Lin Wan transferred to Nanchuan No. 1 Middle School.
She had excellent grades, but she experienced an "anonymous reporting incident" at her original school: she exposed cheating in a competition, but the evidence disappeared and her classmates instead believed that she was framed by others out of jealousy. After transferring to another school, she decided not to meddle in other people's affairs, nor to trust anyone easily.
On her first day at the new school, she accidentally broke into an abandoned broadcast room and met Zhou Xubai who was secretly repairing equipment.
Zhou Xubai is a well-known "problem student" in the school: he is late, skips late night study, and is always at the bottom of his grade list, but he can easily get full marks on competition questions. No one knows that he is alone investigating the real reason why the campus radio station was shut down three years ago.
Due to a punishment, the two were arranged by the teacher to jointly rebuild the radio station.
When the radio station relaunched, they launched an anonymous column called "Letters from Seventeen." Students can put their unspeakable words into the old mailbox, and the anchor will read them out in the evening.
Among the first batch of letters, there was a letter addressed to Lin Wan.
The writer not only knew about her past, but also claimed that the evidence of her disappearance was in Nanchuan No. 1 Middle School.
From then on, each letter helped a classmate and gradually pieced together a story that had been hidden for many years. At the same time, Lin Wan discovered that Zhou Xubai, who seemed casual, might have known her a long time ago.
