A troubled veteran detective and his younger colleague pursue a drug network while confronting professional distrust, personal strain, and escalating danger.
Story Structure — 5 Plot Phases
Quota Chasing Turns Serious
An exhausted police unit pursues petty criminals before midnight. Mun's amnesia and Hong-joo's frustration complicate their work until arrests expose a larger drug distribution network.
Key Events
Quota Chase Before Midnight — The overworked unit pursues petty thieves to meet its arrest quota before midnight. Characters: Mun Bong-soo, Kim Hong-jooLocation: Police district
Mun's Amnesia Revealed — Mun's amnesia complicates his work, but he remains determined to stay on the force. Characters: Mun Bong-soo, Kim Hong-jooLocation: Police station
Petty Theft Arrests — The detectives arrest suspects for theft and drug offenses during the quota push. Characters: Mun Bong-soo, Kim Hong-jooLocation: Urban streets
The Dealer Connection — The arrests reveal links between a dealer, several women, and a wider distribution network. Characters: Mun Bong-soo, Kim Hong-jooLocation: Police station
The Silent Suspect — A frightened suspect refuses to identify the supplier because speaking could get him killed. Characters: Mun Bong-soo, Kim Hong-jooLocation: Interrogation room
Evidence Beneath Respectability
Interrogation evidence involving an addicted woman, her child, and a diary broadens the case. The detectives then suspect that a wealthy businessman is using an art exhibition to conceal drug money.
Key Events
Diary of Associates — Evidence involving an addicted woman, her child, and a diary lists the dealer's female associates. Characters: Mun Bong-soo, Kim Hong-jooLocation: Interrogation room
Tae-hee Waits Again — Mun's work obsession leaves Tae-hee waiting and damages his personal life. Characters: Mun Bong-soo, Kim Tae-heeLocation: Personal meeting place
The Art Exhibition Lead — The team focuses on a wealthy businessman suspected of using an exhibition to conceal drug money. Characters: Mun Bong-soo, Kim Hong-jooLocation: Art exhibition
Warnings From Superiors — Superiors warn that the businessman case is dangerous and difficult to prove. Characters: Mun Bong-soo, Kim Hong-jooLocation: Police headquarters
Mun Loses His Firearm — Mun loses his firearm, creating a dangerous liability during the investigation. Characters: Mun Bong-soo, Kim Hong-jooLocation: Investigation area
The Detective Under Suspicion
Mun's work obsession damages his personal life, while the loss of his firearm leads to an accidental injury. Police leadership questions his reliability, but Hong-joo defends his record and Mun refuses to quit.
Key Events
Mun Loses His Firearm — Mun loses his firearm, creating a dangerous liability during the investigation. Characters: Mun Bong-soo, Kim Hong-jooLocation: Investigation area
Accidental Suspect Injury — A suspect finds the firearm and is accidentally injured, placing Mun's career in jeopardy. Characters: Mun Bong-soo, Kim Hong-jooLocation: Investigation area
Career Under Question — Police leadership doubts Mun's reliability because of his amnesia and the firearm incident. Characters: Mun Bong-soo, Kim Hong-jooLocation: Police headquarters
Hong-joo Defends Mun — Hong-joo argues that Mun's hundreds of arrests prove his dedication despite his mistakes. Characters: Mun Bong-soo, Kim Hong-jooLocation: Police headquarters
Mun Refuses To Quit — Mun insists that catching criminals is the only thing he can still do. Characters: Mun Bong-soo, Kim Hong-jooLocation: Police station
Following The Hidden Route
After a violent confrontation, Mun and Hong-joo continue despite exhaustion. GPS data and vehicle records connect a black Musso to an overnight flight from Tokyo.
Key Events
Violent Suspect Confrontation — Mun has a violent confrontation with a suspect connected to his murdered partner. Characters: Mun Bong-soo, Kim Hong-jooLocation: Urban investigation site
GPS Tracking Begins — Despite exhaustion, the detectives use GPS tracking to continue tracing the criminal network. Characters: Mun Bong-soo, Kim Hong-jooLocation: Police station
Black Musso Traced — Vehicle records connect a black Musso to an overnight flight from Tokyo. Characters: Mun Bong-soo, Kim Hong-jooLocation: Vehicle records office
Following The Shipment Trail — The detectives follow the vehicle and flight information toward the suspected smuggling operation. Characters: Mun Bong-soo, Kim Hong-jooLocation: Shipment route
Pottery Conceals The Network
The detectives locate the basement shipment and discover drugs hidden inside pottery. Their call reporting the operation prepares the final attempt to bring down the network.
Key Events
Drugs Inside Pottery — The search reveals that the organization hides drugs inside pottery for shipment. Characters: Mun Bong-soo, Kim Hong-jooLocation: Basement shipment area
Operation Located — The team locates the basement operation and calls in the discovery, setting up the final takedown. Characters: Mun Bong-soo, Kim Hong-jooLocation: Basement shipment area
Story Breakdown
Quota Pressure — The police unit begins under exhausting administrative pressure.
Midnight Arrest Quota — Officers chase petty thieves before the deadline.
Mun's Amnesia — Mun's memory problems complicate his police work.
Network Emerges — Routine arrests reveal a larger drug distribution structure.
Dealer Connections — Suspects connect several women to a dealer.
Silent Suspect — A frightened suspect refuses to identify the supplier.
Evidence Expands — Investigators use vulnerable witnesses and records to broaden the case.
Addicted Woman — Evidence involves an addicted woman and her child.
Associate Diary — A diary lists the dealer's female associates.
Respectable Cover — The investigation reaches a wealthy businessman and an art exhibition.
Art Exhibition — The exhibition appears connected to drug money.
Official Warnings — Superiors call the case dangerous and difficult to prove.
Mun Under Fire — Mun's reliability and career are threatened by personal and professional failures.
Lost Firearm — Mun loses his firearm during the investigation.
Career Doubts — A suspect's accidental injury prompts leadership to question Mun.
Loyalty Tested — Hong-joo supports Mun while Mun recommits himself to the case.
Hong-joo Defends — Hong-joo cites Mun's record of hundreds of arrests.
Refusal To Quit — Mun insists that catching criminals is what he can still do.
Tracking The Route — The detectives use technology and records to find the smuggling path.
GPS Device — The team uses GPS tracking to follow the investigation.
Black Musso — Vehicle records link a black Musso to a Tokyo flight.
Basement Discovery — The investigation reaches the hidden shipment operation.
Drugs In Pottery — Drugs are concealed inside pottery.
Operation Located — The team reports the basement discovery and prepares the final takedown.
“Never to Lose” concerns the men of Homicide Unit 3, who are in dire straits at the moment. While Unit 3’s cops are full of ambition and talent, they never seem to crack a case. The team is comprised of Detective Koh, a 15 year veteran, Detective Kim (Min-jun Kim), a rookie eager to make a name for himself, Detective Koh, a married man who spends more time on the job than with his wife, and Detective Ryung ( Sang-mi Nam ), who can’t get taken seriously by her peers because she’s a woman. While at a party with his girlfriend, Kim happens upon information about a drug deal that could get the team the respect they’ve been looking for. But what the team gets into turns out to be not just a big drug bust, but a case that makes Homicide Unit 3 the target of the largest drug lord in Korea .
