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Private Notes
This prequel will show an “untold story” that viewers couldn’t see from the original episodes, and it will specifically focus on the Dol Dam Hospital. Dong-joo and Seo-jung have their final pictures taken together as they spend their last few days together at Doldam Hospital. The letter's contents are finally revealed, which changes everything for the couple again. They're both set to their new adventures, and Master Kim gets the break he deserves in a long time. Master Kim meets a beautiful face in an unexpected place.
Dong Joo is one of the interns who have joined Geodae Hospital recently. He is notorious among his seniors for disobeying and playing smart. Seo Jung gives advice to him that as an intern, he should follow whatever he's told without thinking. She further explains that the intern should put an elephant into a fridge even if it seems impossible.
Seo Jung suddenly disappears one day after the car accident. Meanwhile, Doctor Do asks Dong Joo to operate a VIP patient and tells him to take it as an opportunity. Dong Joo accepts it but fails. Later on, Dong Joo receives a personnel order and heads to Doldam hospital in Jeongseon, and meets someone there.
Master Kim and Dong Joo operates on Seo Jung’s wrist as she cuts herself. During the operation, Dong Joo gets shock with Master Kim’s speed and tries to follow his speed. Meanwhile, Master Kim kicks out Seo Jung since he thinks of her as a mentally disturbed patient.
Seo Jung gets caught while treating a patient even though she was kicked out by Master Kim. Master Kim gets furious about it and Seo Jung goes to beg for his mercy. Dong Joo gets angry after finding it out and goes to face Master Kim. Meanwhile, Chairman Shin visits Doldam Hospital to meet Master Kim.
Dong Joo comes to know that Master Kim is Dr. Boo Yong Joo and tries to stay back at Doldam Hospital to learn things from him. Finally, he gets a chance to perform a combine operation with Master Kim. Meanwhile, President Do asks Dr. Song to check on Master Kim by using Dong Joo. Therefore, he heads to Doldam Hospital with In Beom.
Dong Joo goes to have lunch with Geodae Hospital staffs and hears something bad about Master Kim. Meanwhile, an emergency patient arrives at Doldam Hospital and Seo Jung decides to operate on him with In Beom as there is no one who can take care of it.
Dr. Song passes a letter of appointment to Mr. Jang and tells him that he is now Manager Jang. By passing the letter, Dr. Song asks Manager Jang to reveal every secret of Doldam Hospital. Meanwhile, Dong Joo and In Beom get into a fight and In Beom punches Dong Joo.
An armed man holds Seo Jung as a hostage and barges into the operating room. He yells at Master Kim to stop the surgery, but Master Kim continues the surgery till the end. Meanwhile, Ms. Ji from Geodae Hospital comes to know about Seo Jung’s PTSD history.
President Do comes to Doldam Hospital in order to explain himself to Chairman Shin. Seo Jung ends up running away after writing a letter of resignation, but Dong Joo eventually finds her. Seo Jung also gets a diagnosis that she does not suffer from PTSD, so she can happily return. Meanwhile, Ms. Woo seems to have a secret.
Doldam Hospital faces extreme times when a rear-end collision involving six vehicles occur. As the traffic accident patients flood in, Mr. Choi from Internal Affairs’ daughter is also involved in the accident. Mr. Choi tries to stop Master Kim from performing any medical practices despite his daughter’s life is on the line.
President Do suggests an incredible offer to Dong Joo, so that he can bring Dong Joo over to his side. Master Kim comes to know about it, but tells Dong Joo to decide his future on his own. Meanwhile, Seo Jung comes to know about Master Kim’s pupil, Jang Hyun Joo through In Soo.
Parents of deserter find Dong Joo and ask him about the cause of their son’s death. However, Dong Joo hesitates to answer their question at first place. Meanwhile, the daughter of the sepsis patient who passed away due to Dong Joo’s operation on a VIP visits Doldam Hospital and holds a demonstration against Dong Joo.
Seo Jung tries her best to be the first assistant of Chairman Shin’s operation and with her ceaseless efforts, Master Kim appoints her as the first assistant. Meanwhile, three suspected patients of MERS visit emergency room of Doldam Hospital, and Dong Joo decides to shut down the emergency room.
Seo Jung decides to treat the patients in the emergency room after Dong Joo faints. At the same time, Master Kim receives the results of MERS test. Meanwhile, Dong Joo gets well and decides to get a Christmas present for Seo Jung.
Hyun Jeong visits Doldam Hospital to stop Chairman Shin’s heart operation, but she gets shock after hearing Chairman Shin’s test results. Master Kim asks Chairman Shin to cancel the operation as he has terminal lung cancer. Meanwhile, Dong Joo and Seo Jung act like an enemy as they don’t want other staffs to know about their relationship.
Master Kim decides to do Chairman Shin’s operation. Master Kim tries his best to reduce the surgical time and Dong Joo helps him a lot by asking In Beom to join them. Meanwhile, President Do plans to visit Doldam Hospital and suggests two options to Master Kim as he couldn’t stop Master Kim from the operation.
Master Kim succeeds Chairman Shin’s operation with every Doldam Hospital staff’s help. However, even if the surgery was successful, Chairman Shin fails to wake up and President Do heads to Doldam Hospital. Meanwhile, reporter Oh visits Master Kim and tells him that he would write an article about everything.
People start to gossip about Chairman Shin’s brain-dead condition on social network and President Do decides to take it as a great chance to shut Doldam Hospital down. Meanwhile, Reporter Oh calls Master Kim and asks him to reveal the truth about everything.
President Do publishes an article about Chairman Shin’s surgery without Master Kim’s name on it and invites the medical staff who participated in the operation. Meanwhile, Reporter Oh visits former nurse, Ms. Noh’s restaurant to find out about the truth.
President Do throws a punch at Master Kim as he was humiliated in front of people. President Do and Master Kim’s fight turns into a body battle and a giant ice sculpture falls on Master Kim’s body. Meanwhile, President Do visits Chairman Shin and beg for his help.
As Doldam Hospital suffers from a lack of doctors, Kim Sa Bu visits the main hospital to ask to send young doctors to him and runs into CS fellow Cha Eun Jae and GS fellow Seo Woo Jin. Seo Woo Jin is ostracized by other doctors because he had done whistleblowing on other doctors' corruption and malpractice. On the other hand, Cha Eun Jae always takes a tranquilizer before operations due to her operation fright.
Kim Sa Bu gets disappointed at Woo Jin and tells him to go back. But Woo Jin asks Kim Sa Bu for one more chance and Kim Sa Bu gives Woo Jin a week of grace period to prove himself. Meanwhile, an important figure comes into the emergency room of Doldam Hospital. Do Yoon Wan, the chairman of the Geosan University Foundation figures out the news and begins to work out his scheme.
Dr. Kim chooses the extreme method to save Minister Ryu. After Dr. Kim manages to bring Minister Ryu back to life, Park Min Kook starts doubting on Dr. Kim’s real intention and skills. After Park Min Kook announces the Minister’s condition to press, Dr. Kim just doesn’t seem to care. Cha Eun Jae asks Woo Jin to attend the second surgery but he refuses.
Park Min Kook asks Woo Jin questions about the primary surgery that Kim Sa Bu operated and Woo Jin hesitates to answer them. The director of Doldam Hospital comes back to the hospital and Ah Reum greets him. Eun Jae gets furious on Woo Jin for taking away her opportunity to be in the second operation with Park Min Kook. And Doldam Hospital is on the verge of being sued for malpractice.
Friday is the busiest day as a lot of patients swarm in Doldam Hospital. Eun Jae still finds it hard to perform surgical operations herself. A girl patient who suffers from drug poisoning because of her father's joint family suicidal attempt reminds Woo Jin of a painful memory from his childhood. And the staff of Doldam Hospital resents after hearing a rumor that there will be a new director.
Teacher Kim leads his team in saving two critical patients at the same time. Eun-jae steps in to protect a woman from her abusive husband.
Min-guk becomes determined to turn people away from Teacher Kim. A situation Eun-jae tries to mitigate takes a turn for the worse.
Even in her final moments, a paramedic save another's life. Woo-jin shows Eun-jae his way of resetting the mind from worries.
Woo-jin looks into diagnoses for Teacher Kim's arm pain. A bus accident conjures up a regretful moment that haunts Min-guk's conscience.
Yoon A-reum protects a patient's rapekit from failing into wrong hands. Min-guk finally brings up the bus accident from 11 years ago to Teacher Kim.
Min-guk asserts his authority by restructuring the hospital staff. Woo-jin is stunned to learn which surgeon was behind a faulty operation.
A recruiter with bitter resentment for Woo-jin tries to tempt staff members to leave Doldam Hospital. Eun-jae's mom asks for a favor.
Eun-jae panics when she runs out of medication from Teacher Kim before surgery. Woo-jin gets coerced into leaving Doldam Hospital.
Teacher Kim tasks Woo-jin with a final assignment. Min-guk performs surgery on a VIP patient despite pushback from Shim Hye-jin.
Do In-beom returns to Doldam Hospital to investigate an unsuccessful surgery. Min-guk decides between his greed and the truth.
Bae Mun-jeong comes clean to Woo-jin about the connection between their families. Teacher Kim secures a safe future for Doldam Hospital.
The medical staff of Doldam Hospital fly out in a helicopter to a ship lost out at sea on behalf of Teacher Kim, who is absent on vacation.
As the patient's lung condition deteriorates due to tuberculosis, Teacher Kim opens the trauma centre operating room for Ri Bok-young's surgery.
Doldam Hospital hires new personnel. The people of Doldam, who thought Teacher Kim would be the new head of the trauma centre, hold an emergency meeting.
Patients injured in a residential fire are rushed into the emergency room. Woo-jin treats the suspected arsonist despite Dong-hwa's criticism.
Cha Jin-man hates that Teacher Kim's methods are deeply rooted into Doldam Hospital and takes everyone except Sun-woong and Dong-hwa to the trauma centre.
The trauma centre loses a patient and receives another patient in critical condition. Meanwhile, a child visits Teacher Kim at Doldam Hospital.
Wounded soldiers are rushed to Doldam Hospital. Ah-reum is left alone to tend to the emergency room when rogue patients suddenly cause a scene.
Patients rush into the emergency room while the staff tends to surgeries. Doldam Hospital falls into chaos as the gunman's identity is revealed.
When an old building collapses resulting in several casualties, a disaster medical support team is dispatched to the site.
Doldam Hospital receives news of a second collapse, but the place is still full of injured people. Teacher Kim leaves everything and heads to the scene.
Ko Kyung-sook does not give up the legal battle over her son's death. She proposes a secret deal to bring down Cha Jin-man, but Teacher Kim opposes to it.
Cha Jin-man fails to find the culprit who broke into the director's office. His reputation is further ruined as incidents from his past become known.
Kang Dong-joo returns to Doldam Hospital, with his unconventional proposals causing a stir in the trauma centre.
Eun-jae performs emergency surgery on a non-trauma patient while she must join another surgery for a patient with multiple trauma.
People injured from a forest fire rush into Doldam Hospital. Yet, the trauma centre is empty due to the staff staging a boycott against Kang Dong-joo.
A fire approaches as if it would devour Doldam Hospital at any moment. Only after evacuating all the patients do the staff realise Teacher Kim was gone.
