Mercy for None (Korean: 광장) is a 2025 South Korean action noir television series written by Yoo Ki-seong, directed by Choi Sung-eun, and starring So Ji-sub, Huh Joon-ho, Ahn Gil-kang, Lee Beom-soo, Gong Myung, Choo Young-woo, and Jo Han-chul. It was released on Netflix on June 6, 2025.
Contents
Synopsis
Nam Gi-jun, a former criminal gang enforcer, leaves his brother and criminal past behind after an incident. Eleven years later, his younger brother, Nam Gi-seok, is brutally murdered, forcing Gi-jun back into the world of crime to uncover the truth and seek brutal revenge on those responsible.
Cast and characters
Main
So Ji-sub as Nam Gi-jun
A former top enforcer of the Joowoon organisation, he severed his Achilles tendon and left to make peace with the opposing gang, but returned after 11 years due to his younger brother Gi-seok's death.
Huh Joon-ho as Lee Joo-woon
The head of Joowoon.
Ahn Gil-kang as Gu Bong-san
The head of Bongsan, a rival organisation of Joowoon.
Lee Beom-soo as Sim Sung-won
The CEO of N.Clean, a trauma cleaning company.
Gong Myung as Gu Jun-mo
Bong-san's son who is expected to take over the reins of Bongsan from his father.
Choo Young-woo as Lee Geum-son
Joo-woon's son who is a prosecutor.
Jo Han-chul as Choi Sung-cheol
A director of Joowoon, and Joo-woon's capable assistant.
Supporting
Jung Gun-joo as Chun Hae-bum
Gi-seok's assistant.
Ahn Se-ho as Kim Chun-seok
A department head of Bongsan. Formerly under Joowoon, he betrayed the organisation to join Bongsan.
Kang Shin-hyo as Hong Hyun-seok
A director of Bongsan.
Ji Yi-soo as a female employee of N.Clean
Kim Hak-sun as Han Seok-yoon
The chief of the Investigation Unit of the Seoul Metropolitan Police Agency.
Ku Sung-hwan as a detective of the Seoul Metropolitan Police Agency
Lee Sang-hee as a lawyer
Lee Ki-young as a doctor of Taekwang Clinic
Lee Jae-yoon as Kaneyama / Kim Gil-rok
A Zainichi Korean contract killer.
Kim Tae-in as Jung In-seok
A former MMA champion who was recruited by Jun-mo.
Don Mills as Hyung-jin
A fighter who accompanied In-seok.
Special appearances
Cha Seung-won as Cha Yeong-do / Mr. Kim
A person who exists for the coexistence of Joowoon and Bongsan organisations. He is a superintendent of the Seoul Metropolitan Police Agency.
Lee Joon-hyuk as Nam Gi-seok
Gi-jun's younger brother, and the second-in-charge of Joowoon. He was brutally murdered, which led to Gi-jun's road of revenge.
Production
Development
The series is based on the webtoon Plaza Wars: Mercy for None by Oh Se-hyung and Kim Geun-tae. It is directed by Choi Sung-eun, written by Yoo Ki-seong, and produced by Yong film and Studio N.
Casting
In February 2023, So Ji-sub was cast to appear as the lead in the series. In July, Gong Myung was cast and positively reviewing the script. In August, Lee Joon-hyuk, Huh Joon-ho, Lee Beom-soo, Ahn Se-ho, and Ahn Gil-kang were cast with the former making a special appearance.
Filming
Principal photography began in the second half of 2023.
Release
The series was released on Netflix on June 6, 2025.
Reception
On the review aggregator website Rotten Tomatoes, 88% of 8 critics' reviews are positive, with an average rating of 7.6/10.