Detention

In 1962, a sense of desolation and tension permeates the society. Fang, a 12-grader at Tsuihua Senior High School, falls in love with Zhang, a counseling teacher. Troubled by problems at school and home, Fang feels that Zhang is the only person who understands her. Longing for freedom, Zhang forms a study group with his colleagues and students, including Yin and Wei. Reading banned books allows them to be liberated briefly but also puts their lives in danger. One day, Zhang vanishes into thin air, and only Fang and Wei remember him. Together, they start looking for the teacher but find the school gradually slipping out of their familiar world. Then, in a realm dominated by ghosts and spirits, they are forced to face the terrifying truth.