Three high school girls are bored and decide to conduct a séance with a bunshinsaba - a traditional Korean ouija board. As the spirit is called by Eun-jung (Lee Yoon-ji), her sister, Eun-seo (Jeon Hye-bin), scolds the girls. Eun-jung jokingly wishes that the ghost had taken Eun-seo away and that if they do not send the ghost away, it will kill them.