Story Structure — 4 Plot Phases
Relocation and First Sighting
Hee-yeon and Min-ho move to Mt. Jang to heal from grief. Children discover a mysterious hole in a brick wall, leading to the first supernatural encounter.
Key Events
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Relocation to Mt. Jang — Family moves to mountains to heal after son's disappearance. Characters: Hee-yeon, Min-ho
Location: Mt. Jang Residence
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Grandmother's Auditory Hallucination — Grandmother hears dead sister's voice calling from the forest. Characters: Hee-yeon, Min-ho
Location: Mt. Jang Woods
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Children Discover Brick Wall — Local kids find a hole in a wall after searching for their dog. Characters: Hee-yeon, Min-ho
Location: Brick Wall
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Girl Pulled Through Hole — A girl is dragged through the wall by an unseen force but escapes. Characters: Hee-yeon, Min-ho
Location: Brick Wall
The Mimic's Arrival and Growing Dread
A girl appears at the couple's door, mimicking their missing daughter. Hee-yeon takes her in while Min-ho grows increasingly suspicious and unsettled.
Key Events
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Girl Pulled Through Hole — A girl is dragged through the wall by an unseen force but escapes. Characters: Hee-yeon, Min-ho
Location: Brick Wall
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Investigation of the Hole — Min-ho enters the hole and finds a bolted door behind it. Characters: Hee-yeon, Min-ho
Location: Brick Wall
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Discovery of Mutilated Corpse — A dead mutilated woman falls through the door when it is opened. Characters: Hee-yeon, Min-ho
Location: Behind Bolted Door
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Mimic Appears at Door — A mysterious girl appears at night and Hee-yeon takes her in. Characters: Hee-yeon, Min-ho, Girl
Location: House Entrance
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Voice Mimicry Begins — The girl calls Hee-yeon 'Mom' and perfectly mimics their missing daughter's voice. Characters: Hee-yeon, Girl
Location: House Interior
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Signs of Abuse Found — Hee-yeon notices physical abuse marks on the girl's body. Characters: Hee-yeon, Girl
Location: House Interior
Uncovering the Historical Curse
Detective links cases to auditory hallucinations. The grandmother follows a voice into a cave and disappears, prompting Hee-yeon to seek help from a blind neighbor.
Key Events
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Signs of Abuse Found — Hee-yeon notices physical abuse marks on the girl's body. Characters: Hee-yeon, Girl
Location: House Interior
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Marital Tension Over Grief — Min-ho is unsettled by the girl and Hee-yeon's refusal to move on. Characters: Hee-yeon, Min-ho
Location: House Interior
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Detective's Investigation — Detective links missing persons cases to auditory hallucinations of dead loved ones. Characters: Hee-yeon, Min-ho
Location: Police Station
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Historical Photo Revealed — An 1980s photo shows the same girl with a man, linking her to past cases. Characters: Hee-yeon, Min-ho
Location: Police Archives
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Grandmother Follows Voice — Grandmother covers mirrors and follows her sister's voice into the cave. Characters: Hee-yeon, Min-ho
Location: Cave Behind Wall
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Min-ho's Disappearance — Min-ho searches for his mother-in-law and vanishes into the cave. Characters: Hee-yeon, Min-ho
Location: Cave Entrance
Cave Descent and Tragic Resolution
The shaman's curse is revealed. Hee-yeon enters the mirror-filled cave, Min-ho destroys the spirit, but Hee-yeon succumbs to the mimic's voice and returns to the darkness.
Key Events
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Min-ho's Disappearance — Min-ho searches for his mother-in-law and vanishes into the cave. Characters: Hee-yeon, Min-ho
Location: Cave Entrance
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Blind Woman's Warning — A blind neighbor explains the shaman's curse and warns against trusting voices. Characters: Hee-yeon, Girl
Location: Neighbor's House
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Shaman's Backstory Uncovered — The woman reveals the girl is the shaman's sacrificed daughter, now a mimic. Characters: Hee-yeon, Girl
Location: Neighbor's House
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Descent into the Cave — Hee-yeon asks the girl to guide her to Min-ho, entering the mirror-filled cave. Characters: Hee-yeon, Girl
Location: Cave Interior
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Mirror Confrontation — Chased by the spirit, Min-ho breaks the largest mirror containing the entity. Characters: Hee-yeon, Min-ho, Girl
Location: Mirror Chamber
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Spirit's Destruction — Breaking the mirror destroys the shaman's spirit and the girl's host. Characters: Hee-yeon, Min-ho, Girl
Location: Mirror Chamber
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Hee-yeon's Blindness — Weakened by the mimic's voice, Hee-yeon loses her sight completely. Characters: Hee-yeon, Girl
Location: Cave Interior
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Final Temptation — Despite Min-ho's pleas, Hee-yeon turns back to follow her son's voice. Characters: Hee-yeon, Min-ho, Girl
Location: Cave Opening
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Return to the Cave — Hee-yeon follows the girl back into the darkness, leaving Min-ho outside. Characters: Hee-yeon, Girl
Location: Cave Interior
The mother of a missing child takes in a lost girl she finds in the woods, but soon begins to wonder if she is even human.