Kim Nam-gil will play the role of Heo Lim (transliteration), a Joseon man with excellent medical skills. He is tall, handsome, and carefree and casual about everything. Lieutenant General Kim Ah will play Choi Yeon-kyung (transliteration), a Seoul woman with a cold appearance but scars and secrets in her heart. She is a thoracic surgeon in a hospital. She has a beautiful appearance, exquisite makeup, and a model-like figure, but she speaks boldly and has a cold expression. She is a "walking medical book" who won the first place for 6 consecutive years while studying in medical school. The film tells the story of Heo Lim, who is recognized as the best acupuncturist in Joseon, who lost his original intention because of his poor birth and encountered many obstacles. After that, he came to the future 400 years later, that is, Seoul in 2017, and met Choi Yeon-kyung, a believer in modern medicine and a bold personality. This is the first drama that combines modern medicine and traditional Korean medicine, and uses real people as the protagonists in the fascinating historical stream. The male and female protagonists travel back and forth in the double time (the male protagonist travels to the modern era and the female protagonist travels to the ancient times).