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, Kang Chae-young, Kong Hyun-ji, Do Eun-bi, Lee Suk
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, Kim Dae-gon, Gu Hyun
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, Kim Dae-gon, Shin Mun-sung, Jeon Su-ji
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
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
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, Choi Jeong-in
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, Choi Jeong-in
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, Kong Hyun-ji, Lee Ji-hoon
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, Kang Chae-young, Shin Mun-sung, Gu Hyun, Lee Ji-hoon