Brain

A man who suddenly collapses by the swimming pool is brought into the emergency room at Cheonhadae Hospital. Lee Kanghun, a second-year neurosurgery resident, resolutely performs an operation alone and successfully completes it. This establishes him as the right-hand man of senior professor Ko …

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In a dispute with Kim Sang-chul, Lee Kang-hun is told to perform surgery for a week, but he ignores the order during an emergency. Because of an error Lee Kang-hun made while aware of Kim Sang-chul’s instructions, the patient’s life is put in danger, leading to another conflict with Kim …

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Eunkwanghun’s rival, Seo Juseok, is accepted to Stanford Medical School, but hides the fact because he’s afraid he’ll have to leave his girlfriend, Yun Jiyeob. Meanwhile, Eunkwanghun persuades a patient of Kim Sangchul to appear in a medical documentary scenario that Go Jaehak wants to film. When …

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After the surgery, a meeting is held, and Ko Jaehak blames Lee Kanghun for the danger the patient faced during the procedure and for the change in operating surgeons. Seo Juseok hides the fact that he was accepted to Stanford University and applies for a junior professorship. The unexpected …

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After Kang Hoon fails the lecturer exam, a debt collector comes after him over Soon Im’s debts and harasses him. Meanwhile, Kang Hoon accepts without resistance when Jun Seok gives the research presentation they prepared together on his own. But at the conference, Kang Hoon asks Jun Seok an …

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After being reprimanded by Sangcheol, Kanghun applies for an assistant professor position in the neurosurgery department at rival hospital "Hyesung University." Juseok panics when the bleeding won’t stop during surgery on a patient with hydrocephalus. Juseok tells the family that he believes the …

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Jihye confesses her feelings to Kanghun and kisses him, but Kanghun remains emotionless. Wanting to be appointed assistant professor at Hui-seong Hospital, Kanghun asks An Dong-seok, but is politely turned down. Joonseok tries to establish the hierarchy by using his authority as an assistant …

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Jihye prepares the difficult operation in Kanghun’s place. Kanghun performs the surgery for Leedongseok and successfully completes it before transferring to Cheonhadae Hospital. Thanks to Jihye’s preparations and the time she waited, Kanghun manages to finish the operation just in time. After …

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Kang Hoon fails to get a junior professorship at Hye-seong University Hospital, and to make matters worse, Soon-im becomes ill and is taken to the emergency room. The top specialist, Kim Sang-cheol, takes part in Soon-im’s emergency surgery... Despite everyone’s objections, Kang Hoon decides to …

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Kang Hoon and Kim Sangcheol face off with different memories. Meanwhile, Soon Im’s test results come in, and Kang Hoon searches for a clinic that can treat her. Jin Young also does everything possible to help Soon Im. Kim Sangcheol establishes the "Institute for Glioblastoma Research" based on …

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Suppressing his bitterness from the bottom of his heart, he begs for Soon-im’s life. He tries to convince Kim Sang-chul that his paper could be useful to the newly formed research team. But Kim Sang-chul finds it difficult to bring Gang-hun onto his team. Meanwhile, Ko Ja-hak prepares a …

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Suneom’s health gets worse by the day, and research can’t move forward because funding is running low. Kanghun grows impatient. At a time when corporate support is urgently needed, Kanghun receives a substantial donation. As Suneom’s condition worsens, Kanghun wants to administer the targeted …

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Suneom loses consciousness and collapses. At Janghoon's insistence, a difficult operation is undertaken, performed by the top specialist, Kim Sangchul. Lonely after sending off her first love, Deokgi, Eunsuk discovers a portrait of Daesik in the conference notes—one he drew himself. Meanwhile, the …

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After Jung-hoon bids Sung-im farewell, he receives a heartbreaking letter from Dr. Kim Shin-woo. Joon-seok Bu urges Joon-seok to hand responsibility for the clinical trial project over to Jung-hoon, leaving Joon-seok conflicted... As Jung-hoon leaves the lab, he asks Ji-hye out to thank her for …

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Despite Kim Sang-chul's opposition, Gang Hoon brings the chairman of Huasong Group to Taiyang Hospital. Since the surgery is difficult even for an experienced doctor, Kim Sang-chul watches it on a monitor. Jihye, who has been waiting anxiously, is disappointed when Gang Hoon ultimately doesn't …

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Kraft Hoon returns to Cheonha University Hospital as a lecturer and reveals his ambitious plans at a conference. Seung Man is uncomfortable to see Kraft Hoon again after betraying him. Tension builds between Ji Hye, whose heart has been closed off by past events, and Kraft Hoon. At Eunjin’s …

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Kang Hoon operates on Song Min-woo in place of Kim Sang-chul. Jiwee is upset with Kang Hoon for ignoring Kim Sang-chul’s advice. Juseok returns from vacation with a bandage around his hand, and Seongman tries to get Kang Hoon’s attention, but it isn’t easy. Yujein is terrified when her daughter …

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After surgery, Kang Hoon is frustrated by the situation, unable even to gain access to Song Min-woo. Kim Sang-chul visits Song Min-woo’s family and tells them that Min-woo’s complete coma is his fault. Hong Eun-sook and Daesik take part in a cardiopulmonary resuscitation competition to protect …

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Kim Sang-cheol’s operation begins at Kang Hoon’s house. Although everyone warns that the operation is dangerous, it goes ahead, and Jun-seok takes over the final stage. Seeing the tender moment between Bong-gu and Ha-young, Beom-jun is emotionally shaken. Kang Hun remembers his past as he looks …

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Kang Hoon learns that Sang Cheol is blind and prepares another surgery. But Sang Cheol disappears and asks Kang Hoon not to waste his time. A year later, Ha Young and Bong Gu’s wedding is taking place when one of Kang Hoon’s patients is in critical condition, and Ji Hye takes over the …

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