A nursing student encounters strange occurrences around the dorm where she's staying. She enlists of another student to unravel the mystery of the dormitory.
Three fashionista friends who are popular on social media attempt to have some offline fun by trying to contact spirits using the age-old Spirit of the Glass game and this opens up to a series of horrific haunting experiences.
Lisa, after being inspired by a Korean drama, writes a book and meets a fan named Kim Gun Hoo. He invites her to tour Korea, and they begin to date. However, Lisa suffers from PTSD after her mother's suicide and forgets her memories of Gun Hoo. She disappears without a trace, but a year later, Lisa reaches out to Gun Hoo, and they reunite. Gun Hoo offers Lisa a copy of "To Room 19," and they promise to stay together this time.
