Having just finished the college entrance examination, Makgok High School's senior high school students, Jo Woo-sung (Kim Young), Joo Dong-il (Kim Tae-min), Choi Jung-yoon (Choi Hee-jin), Kang Min-woo (Kim Min-kyu), and Park Hae-guk (Park Jin), made an appointment to go to the beach to relax. Ryu Eun-ha (So Joo-yeon), who has excellent academic performance, has had poor grades recently. Coupled with the death of her friend Byeon Ji-eun (Lee Yoo-mi), she has continued to be depressed and even has hallucinations. After much consideration, Eun-ha decided to join her friends' tour group to relax. The trip was originally pleasant, but they got lost and accidentally came to an abandoned amusement park. The boys and girls had no scruples, but they didn't know that this was a place where cursed evil spirits were entrenched...