A Killer Paradox

Lee Tang, who was discharged from the army six months ago, struggles with his life and dreams of visiting Canada. He works at a convenience store and relies heavily on his parents for support. One night, he is assaulted by a customer, leading to a violent confrontation and the subsequent murder of the customer. Tang is guilt-ridden and prepares to turn himself in, but discovers his victim was a serial killer. Dutiful detective Jang Nan-gam, remains uncooperative and keeps investigating. It is unclear if Nan-gam is onto him, but Tang continues to kill, revealing his hidden talent for accidentally offending evildoers. The story explores the question of whether Tang is serving justice or evading it, as he discovers his hidden talent for offending evildoers.^[5]

Main

• Choi Woo-shik as Lee Tang: an ordinary college student who realizes that he has the ability to identify evil people after his first accidental murder.^[6]
• Son Suk-ku as Jang Nan-gam: a detective who pursues a murder case committed by Lee Tang.^[6]
• Lee Hee-joon as Song Chon: a former detective who hunts down Lee Tang.^[6]

Supporting

• Kim Yo-han as Roh Bin^[7]
• Kwon Da-ham as Yong-jae: the youngest detective of Violent Crime Team 1 at Daejeon Northern Police Station and Nan-gam's junior.^[8]
• Hyun Bong-sik as Park Chung-jin: a detective of Violent Crime Team 1 at Daejeon Northern Police Station and Nan-gam's marksman.^[9]
• Jung Yi-seo as Seon Yeo-ok: a murder witness.^[10]
• Jo Hyun-woo as Kim Myeong-jin / Yeo Bu-il: a customer at the convenience store where Tang works who turns out as the suspect in a serial murder.^[5]
• Roh Jae-won as Ha Sang-min: a sweet boyfriend who spends sweet time with his girlfriend looking through old diaries.^[11]
• Lim Se-joo as Choi Gyeong-ah: a woman who is living a hard life after being betrayed by her trusted lover. She changed her name and face after her private video was distributed by her ex-lover.^[12]
• Lee Joong-ok as Kang Sang-muk: a father who struggles after losing his daughter in an unexpected incident.^[12]
• Seo Jae-kwon as Kang Jae-jun^[4]
• Baek Yu-sung as Lee Jin-seong^[4]
• Choi Sun-woo as Kyung-hwan: Tang's friend.^[4]
• Moon Young-dong as Lee Gwan-hun^[4]
• Lee So-won as Yeon-seo^[13]
• Lee Joo-won as Jang Gab-su: Nangam's father and a former detective at Daejeon Northern Police Station.^[4]
• Yang Mal-bok as Nan-gam's mother^[4]
• Oh Hye-won as Lee Yoo-jeong: a profiler at the Daejeon Metropolitan Police Department who is known for her sharp analytical skills and beauty.^[12]
• Park Kyung-geun as Chief of the Criminal Division at Daejeon Northern Police Station^[4]
• Nam Jin-bok as Prosecutor Ji^[9]
• Lee Ji-hoon as Chief Moon^[4]
• Kim Min-ju as Lee Yeong: Tang's sister.^[4]
• Oh Min-ae as Tang's mother^[4]
• Heo Sun-haeng as Tang's father^[4]
• Jang Joon-hui as Violent Crime Team 1 leader^[4]

The series were directed by Lee Chang-hee, who has worked on the film The Vanished (2018) and series Hell Is Other People (2019), and written by Kim Da-min, who won the grand prize in the 2019 Gyeonggi Scenario Planning and Development Feature Category. Showbox and Let's Film managed the production.^[14] The filming began in the second half of 2022 and took place in Daejeon.^[15][5] Choi Woo-shik, Son Suk-ku, and Lee Hee-joon were cast for the series.^[16]

Netflix confirmed that the series would be released on February 9, 2024.^[17][18]

• A Killer Paradox on Netflix
• A Killer Paradox at IMDb
• A Killer Paradox at HanCinema
• A Killer Paradox at Naver Webtoon (in Korean)
• A Killer Paradox at Naver Webtoon