Story Structure — 4 Plot Phases
The Cost of the First Fire
Five months after a devastating apartment fire, firefighters face another blaze. Sang-woo's fixation on a possible victim and In-soo's loss leave the crew shaken.
Key Events
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Earlier Apartment Fire — A devastating apartment fire occurs five months before the later events.
Location: Apartment building
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New Blaze Response — Sang-woo and his team respond to another fire. Characters: Jo Sang-woo, In-soo
Location: Fire scene
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Dangerous Rescue Fixation — Sang-woo fixates on a possible victim and ignores orders. Characters: Jo Sang-woo
Location: Burning building
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In-soo Is Lost — In-soo is lost during the incident, leaving the crew shaken. Characters: Jo Sang-woo, In-soo
Location: Fire scene
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Crew Faces the Aftermath — The crew is shaken, while Hyun-tae struggles with danger and guilt. Characters: Jo Sang-woo, Hyun-tae
Location: Fire department
A Pattern Behind the Flames
The investigation encounters pressure to call the fires accidents, but evidence and a threatening call suggest arson. The victims appear connected to survivors of the earlier apartment fire.
Key Events
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Crew Faces the Aftermath — The crew is shaken, while Hyun-tae struggles with danger and guilt. Characters: Jo Sang-woo, Hyun-tae
Location: Fire department
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Fires Classified as Accidents — A detective faces pressure to classify the fires as accidental.
Location: Investigation
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Arson Evidence Emerges — Evidence and a threatening call suggest the fires are deliberate.
Location: Investigation
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Survivors Become Targets — The fires appear linked to survivors of the earlier apartment blaze. Characters: Jo Sang-woo
Location: Investigation
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Methodical Killings — The arsonist's targets are being killed methodically.
Location: Investigation
The Hospital Connection
Investigators connect victims to children treated in hospital wards by the same doctor. The culprit warns Sang-woo and threatens people close to him.
Key Events
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Methodical Killings — The arsonist's targets are being killed methodically.
Location: Investigation
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Hospital Records Linked — The investigation connects victims to children treated in two hospital wards by the same doctor. Characters: Jo Sang-woo
Location: Hospital records
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Warning to Sang-woo — The culprit warns Sang-woo not to interfere and threatens people close to him. Characters: Jo Sang-woo
Location: Unspecified
The Hospital Inferno
Firefighters respond to a hospital blaze while Sang-woo searches for the culprit. Smoke, a possible explosion, and a broken emergency pump increase the danger.
Key Events
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Hospital Fire Breaks Out — A fire breaks out at the hospital as firefighters rush to contain it and evacuate people. Characters: Jo Sang-woo, Hyun-tae, Hui-soo
Location: Hospital
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Culprit Confronts Doctor — The person behind the fire confronts the doctor and says they once trusted her. Characters: Hui-soo
Location: Hospital
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Smoke and Explosion Risk — Smoke spreads through the building, and an air vent could cause an explosion. Characters: Jo Sang-woo, Hyun-tae
Location: Hospital
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Fire's Real Target Suspected — Blueprints lead the firefighters to suspect the fire's target may be elsewhere in the hospital. Characters: Jo Sang-woo, Hyun-tae
Location: Hospital
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Broken Pump Blocks Response — The emergency pump is broken, so electricity must be restored to operate it. Characters: Jo Sang-woo, Hyun-tae
Location: Hospital
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Catastrophe Still Unresolved — The firefighters continue confronting the escalating blaze; the account gives no outcome. Characters: Jo Sang-woo, Hyun-tae, Hui-soo
Location: Hospital