Trigger (Korean: 트리거) is a 2025 South Korean action thriller television series written and directed by Kwon Oh-seung. Starring Kim Nam-gil and Kim Young-kwang, it was released on Netflix on July 25, 2025.
Contents
Synopsis
Trigger follows a rise in illegal gun distribution and escalating gun crimes. The story centers on two men—one a righteous police officer, the other a cunning arms dealer—who wield weapons for vastly different reasons.
Cast
Main
Kim Nam-gil as Lee Do
A former military sniper turned police officer investigating the illegal firearms trade.
Kim Young-kwang as Moon Baek
Moon Seong-hyun as teen Moon Baek
A mysterious arms dealer with a dual personality and a carefully orchestrated agenda.
Park Hoon as Koo Jeong-man
The leader of a cleanup squad working for Gong Seok-ho.
Supporting
Gil Hae-yeon as Oh Kyung-sook
A mother who is on a one-man protest for her son who died from a work-related accident.
Kim Won-hae as Jo Hyeon-sik
A police sergeant at Domyeong Police Station and a father figure to Lee Do.
Woo Ji-hyun as Yoo Jung-tae
A civil service exam candidate.
Yang Seung-ri as Gong Seok-ho
The boss of the Glory Gang.
Lee Suk as Jeon Won-seong
A sex offender who has an electronic tag on his ankle.
Jang Dong-joo as Jang Jung-woo
A police officer and Lee Do's partner.
Cha Rae-hyung as Seo Hyung-joo
A detective of the Violent Crimes unit of Gyeongin Seobu Police Station.
Park Yoon-ho as Park Gyu-jin
A bullied student in Jeongil High School.
Son Bo-seung as Seo Yong-dong
A bullied student in Jeongil High School.
Hong Min-gi as Kang Seong-joon
A student in Jeongil High School who frequently bullies Gyu-jin and Yong-dong.
Special appearances
Jung Woong-in as Yoon Won-cheol
A superintendent of Gyeongin Seobu Police Station.
Jo Han-chul as Chief Joo
The chief of the Violent Crimes unit of Gyeongin Seobu Police Station.
Lee Ji-hoon as a repairman
Formerly a fellow military comrade of Lee Do.
Carson Allen as subway rider
Production
The series is written and directed by Kwon Oh-seung, who directed Midnight (2021). Its production budget was about ₩30 billion.
Reception
On the review aggregator website Rotten Tomatoes, 100% of 9 critics' reviews are positive, with an average rating of 7/10.
