Jang-Geum and Shin-Bi discuss how things were strange with ‘nae-ee-ohn’s best medicine woman, Yuh-Ri’s diagnose. But Yuh-Ri arrives to defend her skills. She confidently states what she believes to be true. Jang-Geum still thinks Yuh-Ri is wrong but says nothing because she is not sure if she’s right.
The ‘nae-ee-ohn’ staff meet to discuss what’s wrong with the lady queen based on what everyone observed and examined. Everyone gives a response that suggest that the lady queen’s system is working too slow based on her pulse but Jang-Geum shows she disagrees but still says nothing.
Yuh-Ri practices needle treatment on Shin-Bi while Doctor Jung and Jang-Geum watch. Then Yuh-Ri repeats the procedures on the lady queen who is burning a fever and battling consciousness. When Yuh-Ri pokes a needle in the lady queen yells in pain and vomits. The medical staff and maids worry again. The king is furious that his wife is not getting proper treatment after losing her baby.
Gang Tuk-Goo hears news that ‘nae-ee-ohn’ is under heavy distress trying to figure out how to treat the lady queen. Jang-Geum researches to confirm her suspicion about the lady queen’s condition even though it is not logic. Right Prime Minister Oh yells at ‘nae-ee-ohn’ staff and holds them responsible should anything go wrong with the lady queen. Shin-Ni goes to see the doctor lecturer to tell him that Jang-Geum is working on something. Jang-Geum is summoned by the doctors to a meeting. The senior medicine women question Jang-Geum’s qualification to diagnose the lady queen.
Jang-Geum reports the lady queen had a spreading pulse caused by a dead fetus inside her body. The doctors argue that it can’t be so since the lady queen already had a miscarriage. Then the medicine scholar states the lady might pregnant with twins then. The doctors and the senior medicine women are impressed by Jang-Geum’s skills, since a spreading pulse is extremely difficult to detect. The doctors ask Oh for permission to allow Jang-Geum to treat the lady queen. Oh is reluctant since Jang-Geum is a new staff. But the doctors state if indeed Jang-Geum is correct then the lady queen is in dire danger so Oh agrees.
The doctors stay behind a screen while Jang-Geum and Yuh-Ri examine the lady queen again to treat her. Yuh-Ri determines a stagnant pulse but Jang-Geum reports a floating pulse which is result of the spreading pulse. The doctors discuss which diagnose to follow since they’re conflicting. They decide to go with Jang-Geum’s diagnose. Doctor Jung tells Yuh-Ri to perform needle treatment on the lady queen to treat the spreading pulse but Yuh-Ri declines saying Jang-Geum must do it since it’s her diagnose. Jang-Geum practices once and performs the treatment on the lady queen with Doctor Jung giving her his confidence.
Lady Choi who has been by the lady queen’s side since she’s a superior sang-goong, wonders about Jang-Geum’s treatment. After the treatment, Jang-Geum and Shin-Bi go and cook the herbal medicine for the lady queen.
Lady Min and Chan-Ee complain about Jang-Geum budding in again since it got her in trouble before, while Yun-Saeng kneels and prays to Lady Jung to save Jang-Geum. Young-Roh reports to Geum-Young that the lady queen has no sign of recovery thus far and wishes they can kill 2 birds with one stone with this opportunity, getting rid of both Jang-Geum and the lady queen.
Duk Gu meets with master Min Jung-Ho and tells him about what’s going on in the palace and with Jang-Geum. The lady queen suffers from extreme pain again and the king is informed of this by Lady Choi. The king goes to see the lady queen. Meanwhile, the lady queen excretes the dead fetus from her body and shows sign of recovery. The king arrives and learns the queen will be fine now that she passed the dead fetus. Lady Choi and Right Prime Minister Oh is displeased by the news.
Yuh-Ri asks for punishment for her mistake. The doctors want to show sympathy toward her but she states she must be fired from the palace. The doctors agree that she should be punished but not fired so they agree to the punishment she asks for, which is to do chores until she forgives herself. The senior medicine women tells Yuh-Ri she didn’t have to go so extreme but Yuh-Ri insists she will learn from Jang-Geum from now on. Alone, Jang-Geum apologizes to Yuh-Ri but Yuh-Ri shows her true self by ordering Jang-Geum not to pity her and leaves.
The doctors congratulate Jang-Geum. the medical scholar arrives to brag that Jang-Geum is his student and leaves. Lady Choi discuss with head of nae-ee-ohn about the event. The head doctor assures her things will be okay. Yuh-Ri watches the exchange from distance.
Geum-Young has a pain attack in her stomach and remembers Jang-Geum asking her about her abdominal pain when she was getting her foot massaged by Jang-Geum.
Jang Duk continues her stay in Han-Yang, treating patients for all illnesses including dental problems. After she returns to her office after treating a dental patient, she gets a visit from Min Jung-Ho. After he leaves, Jang-Geum and Tuk-Goo arrive. She asks Jang-Geum if she saw Min Jung-Ho but Jang-Geum missed him.
Min Jung-Ho urges his superior to ask the king to approve developing land and men to build weapons. The superior brings up the idea to the king who is delighted by the suggestion, but Oh is nervous because that would affect his monopoly over weapon import.
The lady queen is completely recovered and learns about the new medicine woman who healed her and asks to see her. Lady Choi is distressed by it and goes to see Oh who tells her Min Jung-Ho is threating their fortune. To Lady Choi’s delight, the mother queen is angry at the lady queen and the king, and refuses to receive treatment for her own illness.
The lady queen and the king is shocked and rendered speechless.