Jun-hyeok, a contract teacher at a high school, is about to face his evaluation for a permanent position, but the prospects are not promising. At that moment, Jun-hyeok notices that the head of the student department, who is in charge of the evaluation, is particularly favoring Chang-min, and suddenly remembers confiscating Chang-min's phone not long ago. Filled with suspicion, he tries to meet Chang-min alone in an empty classroom to talk, but finds himself in an unexpected situation.