Trigger

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  1. Episode 1

  50m

  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.

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  2. Episode 2

  61m

  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.

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  3. Episode 3

  43m

  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.

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  4. Episode 4

  55m

  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.

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  5. Episode 5

  45m

  Guns reach bullied students and grieving parents, sparking new tragedies. Lee Do uncovers a network delivering weapons to vulnerable people across Korea.

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  6. Episode 6

  44m

  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.

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  7. Episode 7

  46m

  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.

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  8. Episode 8

  46m

  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.

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  9. Episode 9

  37m

  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.

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  10. Episode 10

  41m

  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.

Cast

Park Yoon-ho

Park Gyu-jin

Kim Nam-gil

Lee Do

Kim Young-kwang

Moon Baek

Moon Seong-hyun

Teenage Moon Baek

Park Hoon

Koo Jeong-man

Kil Hae-yeon

Oh Gyeong-suk

Kim Won-hae

Cho Hyeon-sik

Woo Ji-hyun

Yoo Jeong-tae

Jung Woong-in

Yoon Won-cheol

Cho Han-cheul

Captain Joo

Ahn Se-ho

Kim Deok-hyeon

Cha Rae-hyung

Seo Hyeong-ju