Plot Analysis Summary
An isolated island investigation becomes a web of suspicion, uncertain testimony, and unresolved deaths and disappearances.
Story Structure — 4 Plot Phases
Arrival Among the Missing
A confidential investigator reaches a remote island after all seventeen residents are reported missing. Signs of blood and warnings about ghosts establish an unsettling mystery.
Key Events
-
Investigator Sent to Island — In 1986, a confidential investigator is sent to investigate the disappearance of all seventeen residents.
Location: Remote island
-
Warnings of Ghosts — Warnings about ghosts and the island's unsettling reputation deepen the unease.
Location: Remote island
-
Blood Found on Arrival — The investigator finds signs of blood while trying to determine what happened.
Location: Remote island
-
Civil-Defense Drill Record — A record of a civil-defense drill appears among the scattered clues.
Location: Remote island
Clues and Conflicting Accounts
A drill record, residents' routines, and old tensions emerge as the inquiry develops. Reports of intruders and Bong-soon's removal complicate what can be trusted.
Key Events
-
Routines and Old Tensions — Conversations gradually reveal residents' ordinary routines and old tensions.
Location: Remote island
-
Deaths and Disappearances — Further deaths and disappearances lead the islanders to suspect one another.
Location: Remote island
-
Tae-gi Reports Intruders — Tae-gi says he saw several men enter a building the previous night. Characters: Tae-gi's mother
Location: A building on the island
-
Confused Account of Bong-soon — A resident recounts seeing an engineer take Bong-soon away after demanding she be handed over; the account remains uncertain. Characters: Bong-soon
Location: Unspecified location on the island
Evidence Without Certainty
The islanders debate whether a missing man was murdered or died by suicide, and the knife and rubber shoe produce no firm conclusion. Uncertain radio contact leaves them without immediate help.
Key Events
-
Murder or Suicide Debate — The islanders debate whether a missing man was murdered or took his own life.
Location: Remote island
-
Knife and Rubber Shoe — A knife found with a rubber shoe raises suspicion, but the evidence is disputed.
Location: Remote island
-
Radio and Help Uncertain — Uncertainty about the radio and delayed help leaves the islanders isolated.
Location: Remote island
The Doctor Under Suspicion
Sang-goo urges the islanders to restrain the doctor, while objections leave his guilt unresolved. The Mayor proposes another incident as a test, and the puzzle-book clue offers no clear answer.
Key Events
-
Sang-goo Targets Doctor — Sang-goo pushes to restrain the doctor, while others object that the doctor may not be the culprit. Characters: Sang-goo
Location: Remote island
-
Mayor Sets a Test — The Mayor asserts authority and proposes that another incident will determine whether the doctor remains a suspect. Characters: The Mayor
Location: Remote island
-
The Fifty-Ninth Puzzle — The doctor searches for a hidden penguin in a puzzle book said to have been brought by the Mayor; the clue points to puzzle 59, where no penguin is hidden. Characters: The Mayor
Location: Remote island
-
Choon-bae Convulses — Choon-bae rushes into a house and begins convulsing; someone calls for help, but the cause remains unknown. Characters: Choon Bae
Location: A house on the island