Get ready for “Mercy For None Season 1,” an action-packed drama web series that launched on OTT platforms on June 6, 2025. This compelling series was brought to life by director Choi Sung-eun and writer Yoo Ki-seong, a joint production and presentation from Yong Film and Studio N. You can stream the full 4-hour and 58-minute experience now.
Mercy For None Season 1 Overviews
| Series Name | Mercy For None Kdrama |
| Original Language | Korean |
| Digital Release Date | 06 June 2025 |
| Runtime | 4 hour and 58 minutes |
| Country | South Korea |
| Genres | Action Drama |
| Writer | Yoo Ki-seong |
| Director | Choi Sung-eun |
| Producer | Yong film, Studio N |
| Season | 01 |
| Total Episodes | 07 |
| Production Co. | Yong film, Studio N |
Mercy For None Season 1 Story
The story begins when Nam Gi-seok is brutally murdered under mysterious circumstances. Gi-jun, now living a quiet life, is drawn back to Seoul to uncover the truth behind his brother’s death. Armed with his signature baseball bat and driven by grief and rage, Gi-jun embarks on a relentless quest for revenge, confronting old allies, enemies, and a complex web of deceit.
Mercy For None Season 1 Screenshots
Mercy For None Season 1 Star Cast
| Actor | Character |
| So Ji-sub | Nam Gi-joon |
| Huh Joon-ho | Lee Joo-woon |
| Lee Beom-su | Sim Seong-won |
| Gong Myoung | Joon-mo |
| Choo Young-woo | Lee Geum-son |
| Lee Jun-hyuk | Nam Gi-seok |
Mercy For None Season 1 Trailer
Mercy For None Season 1 Review
The central plot revolves around Nam Gi-jun (So Ji-sub), a former legendary gangster who had left the criminal underworld after severing his own Achilles tendon as a price. His peaceful existence is shattered when his younger brother, Gi-seok, is brutally murdered. This catastrophic event forces Gi-jun back into the brutal world he abandoned, driven by an unwavering desire for vengeance against everyone involved in his brother’s death.
The series is deeply set within the intricate and dangerous landscape of Seoul’s organized crime. Two major rival gangs, the Juwoon Group and the Bongsan Group, operate under an uneasy truce. Gi-seok’s death shatters this delicate balance, pulling Gi-jun into the power struggles and betrayals within these organizations.
As Gi-jun embarks on his path of retribution, he uncovers a complex web of deceit, hidden agendas, and unexpected twists. The plot reveals that the murder is not a simple act of violence but part of a larger, more sinister scheme involving various figures from the criminal hierarchy, corrupt police, and even seemingly legitimate businesses (like a “trauma cleaning company” that cleans up after murders).
Beyond the action, the plot delves into themes of loyalty, family, and the corrosive nature of vengeance. It explores the strained relationships between gang leaders and their sons, highlighting how the sins of the fathers are often visited upon the children.
While the core revenge premise is acknowledged as somewhat familiar within the genre, reviewers note that the series manages to introduce surprising plot twists, particularly around the mid-point, which keeps the audience engaged and reveals a “more than meets the eye” quality to the story. The identity and motivations of the true mastermind behind Gi-seok’s death offer some satisfying turns.
