Story Structure — 4 Plot Phases
A City Without Witnesses
Hae-won avoids involvement after witnessing violence and loses her job following a mistaken accusation at work. She accepts a trip to Mudo, the island where she spent her childhood.
Key Events
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Hae-won Refuses to Identify an Assailant — After witnessing a woman's fatal assault, Hae-won refuses to identify the culprit. Characters: Hae-won
Location: Seoul
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Hae-won Is Locked in the Toilet — A janitor accidentally locks Hae-won in a toilet; she wrongly blames a co-worker. Characters: Hae-won
Location: Seoul bank
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Hae-won Loses Her Job — After slapping her co-worker over the mistaken prank, Hae-won is fired. Characters: Hae-won
Location: Seoul bank
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Hae-won Accepts the Island Trip — Hae-won accepts a friend's offer to vacation on the island where she spent her childhood. Characters: Hae-won
Location: Seoul
Return to Mudo
Hae-won reunites with Bok-nam, whose life on the island is defined by abuse and isolation. Bok-nam's attempt to escape with Yeon-hee ends in the child's death, while Hae-won's flashback reveals an earlier failure to help her friend.
Key Events
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Bok-nam Welcomes Hae-won — Bok-nam warmly welcomes her old friend, despite Hae-won's ignored letters. Characters: Kim Bok-nam, Hae-won
Location: Mudo
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Bok-nam's Life on Mudo — Bok-nam lives under Man-jong's abuse and tries to protect Yeon-hee. Characters: Kim Bok-nam, Man-jong, Kim Yeon-hee
Location: Mudo
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Bok-nam Tries to Escape — Bok-nam tries to leave the island with Yeon-hee for a better life. Characters: Kim Bok-nam, Kim Yeon-hee
Location: Mudo
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Yeon-hee Dies — Yeon-hee is accidentally killed while defending Bok-nam against Man-jong. Characters: Kim Bok-nam, Kim Yeon-hee, Man-jong
Location: Mudo
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Bok-nam Reveals Yeon-hee's Uncertain Paternity — Bok-nam says Yeon-hee may not be Man-jong's daughter because she was raped by local men. Characters: Kim Bok-nam
Location: Mudo
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The Childhood Assault Flashback — Hae-won flees from harassing boys and witnesses them assaulting unconscious Bok-nam. Characters: Hae-won, Young Bok-nam
Location: Mudo
The Island's Revenge
The locals lie about Yeon-hee's death, and Hae-won again fails to support Bok-nam. Bok-nam begins a killing spree, culminating in the deaths of her mother-in-law, brother-in-law, and Man-jong.
Key Events
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The Locals Lie to Police — The locals lie about Yeon-hee's death, and Hae-won does not support Bok-nam. Characters: Kim Bok-nam, Hae-won
Location: Mudo
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Bok-nam Begins Her Revenge — Bok-nam begins killing people she encounters, armed with a sickle. Characters: Kim Bok-nam
Location: Mudo
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The Mother-in-Law Falls from the Cliff — Bok-nam chases her mother-in-law, who falls onto rocks while trying to reach a boat. Characters: Kim Bok-nam
Location: Cliff on Mudo
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Bok-nam Kills Her Brother-in-Law — Bok-nam decapitates her brother-in-law. Characters: Kim Bok-nam
Location: Mudo
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Bok-nam Kills Man-jong — Bok-nam kills Man-jong after he threatens her and Hae-won. Characters: Kim Bok-nam, Man-jong, Hae-won
Location: Mudo
The Broken Recorder
Hae-won escapes to the mainland, but Bok-nam follows her to Seoul and attempts to kill her. Hae-won kills Bok-nam with the broken recorder, then confronts her guilt by identifying the assailants and reading Bok-nam's letters.
Key Events
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The Oarsman Dies at the Boat — Bok-nam attacks the oarsman; he is caught in the propeller as Hae-won turns the boat. Characters: Kim Bok-nam, Hae-won
Location: Boat off Mudo
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Hae-won Escapes to the Mainland — Hae-won escapes from Mudo to the mainland. Characters: Hae-won
Location: Mainland
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Bok-nam Pursues Hae-won to Seoul — Bok-nam travels to Seoul with the childhood recorder and tries to kill Hae-won in police custody. Characters: Kim Bok-nam, Hae-won
Location: Seoul
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Hae-won Kills Bok-nam — Hae-won kills Bok-nam with the broken recorder; Bok-nam dies in her lap. Characters: Kim Bok-nam, Hae-won
Location: Seoul
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Hae-won Confesses and Reads the Letters — Traumatized, Hae-won identifies the men she had seen assault a woman and reads Bok-nam's discarded letters. Characters: Hae-won
Location: Seoul