Six Lives, One Chain: Your Complete Guide to Netflix's 'Karma' Before the April 4 Premiere

On April 4, 2025, Netflix will premiere Karma, a Korean crime thriller that has been positioned as one of the platform's most structurally daring releases of the year. Starring Park Hae Soo — the actor whose turn as Cho Sang-woo in Squid Game made him internationally recognizable — and Shin Min Ah, the series builds its premise around a question that Korean crime fiction has long been drawn to: what happens when an act of violence sets off a chain of consequences that no single person can contain?

With the premiere two days away, here is everything you need to know before the first episode drops — the source material, the cast, the production team, and why this particular series arrives at a meaningful moment for Netflix Korea's crime thriller output.

The Source: A Webtoon About Chains, Not Characters

Most Korean drama adaptations begin with a single protagonist. Karma is built differently. The original webtoon by Choi Hee-seon, published on Kakao, follows six characters whose lives intersect not through relationship or coincidence but through a shared chain of cause and consequence. One character's financial desperation triggers another's cover-up. That cover-up produces a third person's silence. The silence enables a fourth person's crime. And so on.

The structural premise is a moral relay race — retribution passed down a chain of people who may never fully understand how they became part of it. Choi Hee-seon's webtoon built a dedicated readership in Korea precisely because it refused to simplify guilt or exculpate any single character entirely. Everyone in the chain, the story argues, is both victim and agent.

Adapting that premise for a streaming series requires condensing a complex narrative web into something that can be experienced episodically without losing the cumulative moral weight. Director Lee Il-hyung, who also serves as the series writer, has spoken in pre-release materials about the challenge of maintaining the webtoon's structural clarity while giving each character enough screen time to become emotionally legible. The six-episode structure — unusual for Korean drama, which typically runs 12 to 16 episodes — suggests a willingness to let each episode function as a distinct chapter in a continuous argument.

The Cast: Six Roles, Six Angles on the Same Story

Park Hae Soo leads as Han Sung-jun, a man whose initially small financial transgression becomes the first link in the series' chain. The casting carries weight beyond name recognition. Park's post-Squid Game filmography has been deliberately varied — he appeared in the Korean adaptation of Money Heist — but Karma returns him to a moral register he clearly inhabits well: the ordinary person making choices under pressure that are neither heroic nor straightforwardly villainous.

Shin Min Ah plays Oh Yeon-joo, whose storyline intersects with Han Sung-jun's through a circumstance she did not choose but cannot escape. Shin Min Ah has spent the better part of two decades building a reputation as one of Korean television's most technically assured dramatic performers, with credits ranging from Oh My Venus to Hometown Cha-Cha-Cha. Her presence signals that Karma is not structuring its female characters as reactive figures but as full participants in the chain.

The remaining four principal roles — played by Lee Hee-joon, Kim Sung-kyun, Lee Kwang-soo, and Gong Seung-yeon — fill out a cast that is notably ensemble in its orientation. Lee Hee-joon, a character actor whose range extends from comedy to menace, and Kim Sung-kyun, known for his work in Parasite as one of the Park household's drivers, bring theatrical credibility to the project. Lee Kwang-soo, primarily known as a variety personality, appears in a dramatic role that pre-release materials suggest is played against type. Gong Seung-yeon completes the six-person structure.

Netflix Korea's Crime Thriller Strategy in 2025

To understand why Karma matters beyond its own narrative, it helps to place it within Netflix Korea's broader 2025 content strategy. Since Squid Game's global breakthrough in 2021, Netflix has increasingly invested in Korean crime and thriller content as a reliable export category — a genre where Korean production values, tight scripting, and ensemble casting have consistently outperformed content from most other regional markets on the platform.

Karma represents a specific refinement of that strategy. Where earlier crime series often centered on detective procedural structures — police investigations, forensic reveals, institutional corruption — Karma removes law enforcement from the center of the narrative almost entirely. There is no detective working the case. There is only the chain. That structural choice aligns more closely with prestige crime fiction in the tradition of The Wire or Ozark than with the Korean procedural format, suggesting Netflix is deliberately developing Karma for a global rather than solely Korean audience.

The six-episode format reinforces that reading. Netflix's most globally distributed Korean content — Squid Game, Hellbound, The Glory — has trended toward shorter, denser episode counts compared to traditional Korean broadcast dramas. Karma follows that template, aiming for the kind of single-weekend binge pacing that global audiences have demonstrated they prefer.

What to Watch For When Karma Premieres

When the first episode drops on April 4, the most revealing signal will not be the production design or the performances — both appear polished in pre-release footage — but whether the structure can sustain the show's central formal conceit across six episodes. Webtoons work in weekly installments; the reader brings patience. A streaming series must earn that patience in real time, episode by episode, without the webtoon's built-in momentum.

Early critics who have seen the series have placed it at 83% on Rotten Tomatoes based on initial reviews. That early reception, combined with the source material's established readership and the cast's drawing power, positions Karma as one of the more substantive crime drama releases in Netflix Korea's 2025 lineup. Whether it becomes a breakout moment for Park Hae Soo comparable to his Squid Game visibility, or whether Shin Min Ah's dramatic turn earns broader international recognition, will become clear in the days after premiere.

What is already evident is that Karma is attempting something that Korean crime drama has rarely attempted at scale: a story in which no single character is the protagonist, and no single act of wrongdoing is the beginning. For viewers willing to meet that premise on its own terms, April 4 may prove to be one of the more rewarding premieres of the spring streaming season.