A surgeon who does not belong to the hospital she works in has very little to lose there: no committee seat, no professor to flatter, no promotion to protect. Doctor X: Mafia in White, the Korean medical noir coming to Netflix with Kim Ji-won in the lead, is built on that position. Gye Su-jeong is a freelance surgeon placed by a physician-for-hire agency in a university hospital that Netflix describes as “dominated by ego and corruption,” and she takes on the cases other surgeons treat as lost while the institution pushes back against her.

The series is SBS’s Korean adaptation of Doctor-X: Surgeon Michiko Daimon, the TV Asahi drama in which Ryoko Yonekura played a freelance surgeon famous for one boast: she does not fail. The Korean version keeps the setup, a top-tier surgeon dispatched by an agency to fill a surgical vacancy, and moves it to the fictional Gu Seo University Hospital. Korean press materials call it a “cider” medical noir, borrowing the local slang for stories that deliver the fizzy relief of watching the powerful get their comeuppance. It airs in the SBS Friday-Saturday slot that ran Taxi Driver, The Fiery Priest and The Judge from Hell, and it is the first medical drama in that lineup.

The change that matters most is in the title. The Japanese original carried its heroine’s name in its subtitle. The Korean one, 닥터X: 하얀 마피아의 시대, translates as “Doctor X: The Age of the White Mafia,” and it names the opponent instead: the medical establishment in white coats. That shift points the story toward the institution rather than the surgeon’s winning streak, and the early promotion leans the same way. In the teaser, Su-jeong wears black while the doctors around her wear white.

Kim Ji-won plays Gye Su-jeong, whom the promotional materials nickname “the mad dog of the operating room.” Lee Jung-eun is Jang Hee-sook, head of the physician-for-hire agency that places her, a role Korean outlets have described as a money-minded broker. Son Hyun-joo plays Bu Seung-kwon, director of Gu Seo University Hospital, who is trying to rebuild a hospital that is failing. Kim Woo-seok is Park Tae-kyung, a privileged intern whose life at the hospital gets complicated once he meets Su-jeong, and Lee Sung-wook appears as Professor Bae Heung-gon.

The two teasers released so far show how the character is being sold. In the first, Su-jeong tells the hospital’s doctors, “I hate you all,” and adds that people who are nothing but doctors are pathetic. The second opens with her reciting the Hippocratic Oath alone in a graduation cap and ends with the hospital director asking whether Gye Su-jeong is Doctor X. Colleagues in the same teaser wonder aloud whether she is completely obsessed with surgery. Taken together, the material sets up a doctor defined by the oath and the operating table, and by her contempt for everything the hospital has built around them.

This is Kim Ji-won’s first television series since Queen of Tears, the tvN romance in which she played Hong Hae-in, a chaebol heiress running her family’s department store, and which finished as the most-watched drama in the channel’s history. The new role inverts that position. Hae-in had a corporation behind her; Su-jeong has an agency contract and her own hands. Kim was attached to the project well before cameras rolled, and the casting reads as a deliberate step away from the romantic lead most international viewers know her for.

Behind the camera is Lee Jung-rim, whose SBS credits include VIP, an office drama about the staff who serve a department store’s wealthiest clients, and Revenant, the occult thriller starring Kim Tae-ri. Lee also directed As You Stood By for Netflix, adapted from Hideo Okuda’s Japanese novel Naomi and Kanako, which makes Doctor X the director’s second Korean reworking of a Japanese story in a row. In an interview with Cine21, the director framed the new series around a simple observation: a hospital is where people go when they are at their weakest, physically and psychologically, so when did it start to feel so uncomfortable? What Lee said held the script together was faith in people, the belief that they can still move forward. The screenplay is the debut of writer Pyeon Seong-geun, and the series is produced by Studio S, Studio Dragon and HighZium Studio.

Korean television has adapted Japanese hospital stories before. MBC’s White Tower remade Shiroi Kyotō, the saga of a surgeon’s climb through a university hospital, and SBS’s own Dr. Romantic and Netflix’s The Trauma Code: Heroes on Call have kept the lone gifted surgeon at the center of the genre. Doctor X: Mafia in White arrives with a different engine. Its heroine is not climbing the ladder; she has been rented to the building for a fee, and the premise suggests the fee is her protection as much as her skill is.

That arrangement is also the limit the series sets for itself. A hospital that rents a surgeon because it needs her hands can also stop renting her. Whether one doctor working outside the hierarchy can change how a hospital decides who gets treated, or whether the institution will simply pay her rate and carry on as before, is the question the premise opens, and nothing released so far promises an answer.

Doctor X: Mafia in White premieres on October 9, 2026, on SBS in South Korea, airing Fridays and Saturdays at 9:50 p.m. KST, and streams on Netflix the same day. The season runs 12 episodes, two a week, with the finale scheduled for November 14. It is a fictional story, not based on real events, adapted from the Japanese Doctor-X franchise, which ran for seven seasons on TV Asahi and closed with a feature film in 2024.