Kim Youngwoon hasn't lived a content day after his closest friend Park Jungsoo suddenly disappeared one dark, rainy night. Then when Jungsoo comes back into his life one day, Youngwoon is drawn right back to him and wants to figure out why he left. The reason might be hard to process, but the way to change Jungsoo's fate will take even more out of Youngwoon's will and test his love for his close friend. Can they break the curse binding Jungsoo to a world that can't be seen and live together happily?