Doctor X: Mafia in White Episode 2 ends by connecting Gye Su-jeong to a mysterious surgery performed seven years earlier, where a pancreatic cancer patient survived an extremely difficult operation but died only two months later. The medical record identifies the surgeon only as “Doctor X,” strongly suggesting Su-jeong was responsible, although the episode stops short of explaining what actually killed the patient.
Spoiler warning: This article contains major spoilers for Doctor X: Mafia in White Episode 2.
The October 10 episode centers on two pancreatic cancer patients who need treatment at the same time, forcing Su-jeong to confront a hospital system that gives wealthy VIPs priority. SBS’s official Episode 2 description confirms that the conflict revolves around choosing between a VIP and a younger patient while doctors argue over treatment methods.
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What happens at the end of Doctor X: Mafia in White Episode 2?
Su-jeong successfully operates on both patients, including Chairman Park Gwang-cheol, whose pancreatic tumor puts him at serious risk because of its proximity to major blood vessels.
The chairman’s original surgical team considers stopping the operation when the procedure becomes too dangerous. Su-jeong takes over and uses a far more aggressive technique involving the superior mesenteric artery, allowing the doctors to remove the tumor rather than leaving cancerous tissue behind.
Her success initially appears to prove that her confidence is justified. However, the doctors later research the unusual procedure and discover something troubling.
Was Su-jeong the mysterious Doctor X seven years ago?
The evidence heavily points toward Su-jeong being Doctor X.
The hospital finds an older medical report describing a similar pancreatic cancer operation performed seven years earlier. The surgeon reconstructed the superior mesenteric artery during the procedure, essentially using the same kind of technique Su-jeong has just demonstrated.
The operation itself succeeded, but the patient died two months later from an unexplained cause. More importantly, the surgeon’s identity was hidden in the records under the name “Doctor X.”
Episode 2 does not formally state that Su-jeong performed that surgery, so her involvement should still be treated as an implication rather than a confirmed fact. The matching technique, the Doctor X alias and Su-jeong’s reaction make the connection difficult to ignore.
Why is the old patient’s death important?
The revelation challenges the image Episode 2 has carefully built around Su-jeong.
Until this point, she appears almost impossible to defeat in the operating room. She rejects hospital politics, ignores VIP status and repeatedly succeeds where senior doctors hesitate. The seven-year-old case introduces the possibility that her confidence comes with a complicated history involving a patient she could not ultimately save.
It also gives more meaning to Director Bu’s warning that no surgeon can avoid failure forever. Su-jeong responds by focusing on his own failures, but the ending suggests she already understands that lesson more personally than anyone around her realizes.
The unanswered question heading into Episode 3 is therefore not whether Su-jeong can perform impossible surgery. It is what happened after her earlier operation, why the patient died, and why the surgeon’s identity was hidden.
Doctor X: Mafia in White streams on Netflix in supported regions, while SBS airs the series in South Korea.
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