Heo Im is an eastern doctor who is widely regarded as the most skilled practitioner of acupuncture and moxibustion in all of Joseon. His low rank is working against him and preventing him from succeeding. Heo Im suddenly finds himself in Seoul in the present day after embarking on a journey through time. He meets Choi Yeon-Kyung. She is a doctor who has an unwavering faith in solely contemporary medicine.