"The Great Doctor" is a historical fiction novel that follows the journey of Yoon Seo-jung, a skilled physician in the Joseon Dynasty of Korea. The story explores her struggles against societal norms and gender roles as she strives to gain recognition in a male-dominated field. As she navigates the challenges of her profession, Yoon Seo-jung encounters various characters, including King Sejong and other influential figures of the time. The novel highlights themes of resilience, ambition, and the pursuit of knowledge, showcasing the importance of medicine and the impact of one woman's determination on her society.