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🔔 Notify me about new seasonsSynopsis
As illegal firearms flood into a gun-free South Korea, a resolute cop and a mysterious partner join forces to stop the chaos from sweeping the nation.
Themes
Episodes
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- E1 Episode 1Next upJul 25, 2025 · 50 min · ★ 8.3
Synopsis
When a shocking mass shooting shatters Korea's calm, Lee Do races to stop the violence — then realizes the threat of illegal guns is just beginning.
Guest stars: Sun Woo-sun ([Psychiatrist]), Kang Chae-young (Park So-hyeon [Nurse]), Kong Hyun-ji (Cho Se-yeong [Hyeon-sik's Daughter]), Do Eun-bi (Ko Ji-yeong [Water Purifier Coordinator]), Lee Suk (Jeo Won-sung [Sex Offender])
- E2 Episode 2Jul 25, 2025 · 61 min · ★ 8.0
Synopsis
As shootings spread, Lee Do discovers guns in the hands of everyday citizens. When a victim hits close to home, his investigation grows more urgent.
Guest stars: Lee Suk (Jeo Won-sung [Sex Offender]), Kim Dae-gon (Cho Woo-tae [Jeong-man's Subordinate]), Gu Hyun (Lee Do (child))
- E3 Episode 3Jul 25, 2025 · 43 min · ★ 7.7
Synopsis
A police raid uncovers a cache of military weapons. Lee Do and his new ally Moon Baek close in on the arms network as the city reels from bloodshed.
Guest stars: Lee Suk (Jeo Won-sung [Sex Offender]), Kim Dae-gon (Cho Woo-tae [Jeong-man's Subordinate]), Shin Mun-sung (Hwang Suk-min [Inspector]), Jeon Su-ji ([Situation Room Chief])
- E4 Episode 4Jul 25, 2025 · 55 min · ★ 7.7
Synopsis
Lee Do confronts a violent standoff and must decide how far to go to stop the killings, while suspicions about Moon Baek threaten their fragile alliance.
Guest stars: Han Sa-myeong ([Internal affairs investigator])
- E5 Episode 5Jul 25, 2025 · 45 min · ★ 8.0
Synopsis
Guns reach bullied students and grieving parents, sparking new tragedies. Lee Do uncovers a network delivering weapons to vulnerable people across Korea.
Guest stars: Kong Hyun-ji (Cho Se-yeong [Hyeon-sik's Daughter])
- E6 Episode 6Jul 25, 2025 · 44 min · ★ 8.7
Synopsis
A gun in the hands of a student spells crisis at school. As panic spreads, Lee Do and Moon Baek race rush to restore order — but it may be too late.
Guest stars: Song You-hyun ([Teacher]), Choi Jeong-in ([Gyu-jin's Mother])
- E7 Episode 7Jul 25, 2025 · 46 min · ★ 7.3
Synopsis
As fear and confusion grow, police and gangs rush to recover illegal guns. Lee Do feels powerless as the true scale of the arms crisis comes to light.
Guest stars: Jeon Su-ji ([Situation Room Chief]), Choi Jeong-in ([Gyu-jin's Mother])
- E8 Episode 8Jul 25, 2025 · 46 min · ★ 7.3
Synopsis
Police raid the gun syndicate, and rival gangs and old enemies clash in bloody battles. Lee Do is pushed to the limits as violence hits all of Korea.
Guest stars: Kang Chae-young (Park So-hyeon [Nurse]), Kong Hyun-ji (Cho Se-yeong [Hyeon-sik's Daughter]), Lee Ji-hoon (Computer Repair Shop Owner)
- E9 Episode 9Jul 25, 2025 · 37 min · ★ 7.3
Synopsis
As guns reach new hands and fear sweeps the nation, Moon Baek's message echoes through the media. Across Korea, people must choose how to respond.
Guest stars: Sun Woo-sun ([Psychiatrist]), Kang Chae-young (Park So-hyeon [Nurse]), Shin Mun-sung (Hwang Suk-min [Inspector]), Gu Hyun (Lee Do (child)), Lee Ji-hoon (Computer Repair Shop Owner)
- E10 Episode 10Jul 25, 2025 · 41 min · ★ 7.3
Synopsis
With emotions running high, Lee Do and Moon Baek move toward a crossroads. One final choice will shape Korea's future — or plunge it into darkness.
Guest stars: Kang Chae-young (Park So-hyeon [Nurse]), Shin Mun-sung (Hwang Suk-min [Inspector]), Lee Ji-hoon (Computer Repair Shop Owner), Kim Yoon-jin (Anti-gun Supporter (eps 10)), Han Se-hee (Gun Supporter), Kang Jeon-yeong (Doctor)
Cast & crew
Created by Kwon Oh-seung
Park Yoon-ho
Kim Nam-gil
Kim Young-kwang
Moon Seong-hyun
Park Hoon
Kil Hae-yeon
Kim Won-hae
Woo Ji-hyun
Jung Woong-in
Cho Han-chul
Ahn Se-ho
Cha Rae-hyungVideos
Trailers
Images · 14
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Reviews · from TMDB members
MovieGuysAug 10, 2025
"Trigger" doesn't quite hit the mark. This series feels like a string of encapsulated morality tales, espousing the dangers of unfettered access, to firearms. Any pro gun control advocate, will, I'm sure, applaud it. Others might point out that Switzerland has high levels of gun ownership but low levels, of gun related crime. In any case, when viewed through the lens of entertainment, this series quickly becomes repetitive and tiresome. It's like an elaborate, drawn o… Read more
ut version of one of those crude, cautionary safety video's, they torment kids with, at school. "Don't play with matches, "Guns are dangerous", you get the idea. Acting, as is so often the case with South Korean drama's, is well above average. There are interesting characterisations on offer too but they are constrained, by the limitations in the script. In summary, a little too repetitive, simplistic and preachy for my liking. A broader story, with a subtler message included about gun control, might have worked better. A mediocre watch.