After hitting high school student, Kim Taek In, with a car, 30-year-old, Kwon Hui Chan's, soul ends up in Taek In's body. For twelve hours every day, he must live as Taek In while Taek In's soul lies dormant. Hui Chan believes they only way to stop the soul transmigration is to awaken Taek In's soul. Taek In's heart starts racing when he sees the teacher, Woo Min Jae, who is Hui Chan's former high school classmate. Who wouldn't want to spend time with the person they like? Hui Chan decides to stick close to Min Jae in hopes that Taek In's soul will return. Will Hui Chan be able to return to normal as he gets closer to Min Jae?