K-Movie [ App the Horror ] DVD

Students in a club at Sanglim High School are developing an app called 'Young' that detects ghosts at haunted locations. One night, at a forbidden site, they accidentally awaken vengeful spirits that had been sealed away through a memorial rite.

Afterward, the app begins installing itself at random on the phones of ordinary people: a crime-scene cleaner, a high school student riding a late-night bus with only one other passenger, a store employee who buys a secondhand phone, a patient at a care facility, and a woman who has rented a room of her own. Through the eerie app, which can neither be deleted nor closed, ghosts hidden in everyday life begin to reveal themselves, bringing an inescapable and terrifying curse.