Chigyeong and Seowon, who have been classmates since middle school, only became close after entering the same university and major. One autumn night after the midterm exams, Chigyeong makes a perfect confession to Seowon, whom he has a crush on. However, the next day, when he is supposed to hear the answer, the worst situation occurs... A campus caught in an unpredictable disaster. Will the two of them be able to survive?