A college student named 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, and Hee-jin hears rumors that her sister had been possessed. The whereabouts of So-jin become increasingly elusive and the dead neighbor begins appearing in Hee-jin's dreams.
