College student Hee Jin returns home when her 14-year-old sister So Jin goes missing. Her mother, a fanatic churchgoer, resorts to prayer and refuses to work with the lazy police to find So Jin. Meanwhile, a neighbor commits suicide and leaves a will for So Jin, Hee Jin hears rumors that her sister had been possessed. The whereabouts of So Jin becomes increasingly elusive and the dead neighbor begins appearing in Hee
