If Squid Game shocked viewers with its dark portrayal of human nature and Korean society, another series is taking audiences deep into the underworld of Seoul, where gang wars fuel a relentless cycle of violence. Mercy for None, now streaming on Netflix, is pushing the boundaries of brutality in ways that make even other popular Korean dramas like Hometown Cha-Cha-Cha look like light comedies.
A Brutal Dive into Seoul’s Underworld
Mercy for None (known as Sans Merci in French) is based on a popular webtoon published between 2020 and 2021, and it delivers a stark narrative that will leave you on the edge of your seat. This mini-series, consisting of seven gripping episodes, takes place in the world of two rival criminal gangs: Juwoon and Bongsan, which control the streets of Seoul. The story follows Nam Gi-jun, an ex-enforcer who has been in exile for 11 years. After the murder of his brother, Gi-seok, he returns to exact vengeance, triggering a war that was feared by everyone.
The opening scenes immediately set the tone for the series—raw, physical, and emotionally charged. The script is sparse with dialogue, letting the action speak for itself. The show uses long silences to heighten the tension, and the carefully choreographed fight sequences are as precise as they are violent. Each punch, kick, and bone-breaking moment lands with a sickening crunch, reflecting the bleak realism often seen in Korean cinema, drawing comparisons to classics like Oldboy and The Man From Nowhere, but packaged in a fast-paced episodic format.
A Series Designed for Binge-Watching—but Not for the Faint of Heart

With episodes running under 50 minutes, Mercy for None is perfectly designed for binge-watching, a trend that has become synonymous with many Netflix shows. The series maintains a high level of tension throughout, with an immersive, visually oppressive atmosphere—dim neon lights and grimy alleyways that transport you directly into the heart of Seoul’s most dangerous streets.

The acting is another standout feature. So Ji-sub, known for his roles in romantic K-dramas like I’m Sorry, I Love You, delivers a stunning performance as a man of few words, hardened by life and ready to deliver powerful blows. His portrayal of the emotionally wounded Nam Gi-jun adds depth to a character that could easily have been reduced to a mere action hero. Supporting him are veteran actors like Heo Joon-ho, Ahn Gil-kang, and Jo Han-chul, who add their weight to this intense drama. Even the younger cast, such as Choo Young-woo and Gong Myeong, bring a sense of freshness and energy to the grim proceedings.

But it’s not just the action that sets this series apart—Mercy for None delves into emotional brutality. It isn’t just about fights and gore; the characters wrestle with moral dilemmas, the consequences of their past choices, and fractured family bonds. The show blurs the lines between justice and vengeance, where moral ambiguity is the name of the game. It’s a theme we’ve seen in other Netflix Korean productions like My Name and Fragile Heroes, but Mercy for None takes this approach to a whole new level of intensity.

Rated 16+ for a reason, this series is definitely not suitable for younger viewers or those sensitive to graphic content. It’s a hard-hitting, emotionally and physically intense show that doesn’t hold back. It’s already won over fans of dark, no-holds-barred dramas, particularly those who enjoy gritty, uncompromising storytelling.

So, if you’ve got a strong stomach and an appetite for intense, visceral revenge stories, Mercy for None might just be your next Netflix obsession. With just seven episodes, the series will make its mark, challenging your expectations and staying with you long after the credits roll.
