An ordinary high school girl, Choi Jung-min, lives through hellish days under the bullying of Ha Ju-hyun, a perpetrator of school violence and a powerful figure on campus. She takes revenge only in lucid dreams, but in a burst of rage, she attacks Ju-hyun in a dream—only to find the injuries carry over into reality, leaving her in confusion. She then meets Baek Si-yoon, a “Dream Manipulator” who can control others’ dreams and turn them into reality, and is offered a chance at real-world revenge. Meanwhile, she grows close to Jo Jae-hyuk from a neighboring school and experiences her first flutter of affection, but collapses again amid Ju-hyun’s renewed schemes and betrayal. Ultimately, Jung-min decides not to back down and joins hands with Si-yoon, but their relationship becomes increasingly twisted, leading her to a crossroads.