In high school, Jeong-Min, a social outcast, endures bullying from the popular girl, Ju-Hyeon, who used to be her friend until a falling out over exclusivity. Ju-Hyeon manipulates their past rift to incite ridicule from peers and ostracize Jeong-Min. Faced with this torment, Jeong-Min finds solace in lucid dreaming, her only escape. However, her sanctuary is disrupted when a enigmatic figure appears in her dreams, proposing a way for her to retaliate against Ju-Hyeon.