《X医生：外科医生大门未知子》讲述了主人公大门未知子，一位派遣医生，对外科医学的执着追求和坚持，以及她在东帝大学医院面对医疗失误、派系斗争和权力斗争的挑战。东帝大学医院曾是国内大学医院中的顶尖存在，但近年来却因不可告人的行为和医疗失误而受到质疑和评价下滑。

剧中，大门未知子被雇用进入东帝大学医院，深入由蛭间重胜执掌的权力核心。蛭间重胜一直对大门未知子怀恨在心，并计划重新建立医院的品牌形象，夺取新院长的位子。未知子本着“拯救眼前的生命”为己任，不妥协地为手术和治疗的成功而努力奋斗。在东帝大学医院内，她面对着历史上最危险和最强大的对手之一，副院长久保东子。

随着剧情的发展，大门未知子将在医院的“敌阵”中不断成长，她面对医疗界的种种问题，与久保东子等强大对手展开激烈的较量。在这一过程中，她也必须直面过去的阴影和个人的成长。

这部剧通过展现医生在专业和个人成长过程中的挑战，以及对医疗伦理和职业道德的坚守，向观众展示了一个医疗剧中扣人心弦的故事。

"Doctor X: Surgeon Michiko Daimon" tells the story of the protagonist, Michiko Daimon, a dispatched doctor, who has a deep understanding of surgical medicine. The pursuit and persistence, and the challenges she faces of medical errors, factional struggles, and power struggles at Totei University Hospital. Totei University Hospital used to be a top university hospital in China, but in recent years it has been questioned and its evaluation declined due to ulterior behavior and medical mistakes.

In the play, Daimon Michiko is hired to enter Totei University Hospital, and goes deep into the Jian Zhongsheng is the core of power in charge. Shigekatsu Hiruma has always held a grudge against Michiko Daimon, and plans to rebuild the hospital's brand image and take over the new director's seat. Michiko takes "saving the life in front of her eyes" as her mission, and strives uncompromisingly for the success of surgery and treatment. Inside the Totei University Hospital, she faces one of the most dangerous and powerful opponents in history, Vice President Toko Nagaho.

As the plot develops, Michiko Daimon will be in the "enemy formation" of the hospital As she continues to grow, she faces various problems in the medical field and competes fiercely with powerful opponents such as Toko Kubo. In the process, she must also confront the shadows of her past and grow personally.

By presenting the challenges of doctors' professional and personal growth, this drama As well as the adherence to medical ethics and professional ethics, it showed the audience an exciting story in a medical drama.