New Trailer Reveals Ki-jun's Vengeful Journey in Netflix Series 'Mercy for None'

A first look at the upcoming series offers fans a glimpse into the relentless quest for justice undertaken by Ki-jun, played by Ji-sub So, in Mercy for None. The series, debuting on June 6, is a live-action adaptation of the popular webtoon.

Series Poster and Trailer Unveiled

On May 21, Netflix Korea shared the official poster and trailer for Mercy for None. The trailer provides an intense preview of the action-packed story centered on revenge.

Image of the series

Image via Netflix Korea's Twitter

Plot Overview

The trailer kicks off at the funeral of Ki-seok, Ki-jun’s younger brother, who is portrayed by Joon-hyuk Lee. After years in hiding, Ki-jun (Ji-sub So) returns, exposing clues to a powerful underground network responsible for his brother’s death.

Armed with only a baseball bat, Ki-jun unleashes brutal violence, signaling his return to the violent underworld he once left behind. The series explores his quest for revenge against those involved.

Key Characters

Ki-jun: Returning to confront the criminals behind his brother’s death.
Lee Joo-woon: Played by Joon-ho Heo, a calculating patriarch who declares, “If someone started it, they must pay the price.”
Geum-son Lee: An ambitious prosecutor and Joo-woon’s son, portrayed by Young-woo Choo.

Backstory

Mercy for None follows Ki-jun, a former underworld figure who severed his ties to the criminal world over a decade ago after an injury. Now, he reenters the scene seeking redemption and revenge following his brother’s murder, with Ki-seok once holding a high-ranking position in the organization.

Origin and Popularity

The webtoon Plaza Wars: Mercy for None, serialized in 2020, gained significant popularity before being adapted into a Netflix series. Created by Se-hyung Oh and Gyun-Tae Kim, the series concluded in 2021 and is available on WEBTOON Entertainment.