· Male Protagonist · Lee Do Hyun
· Identity: 28 years old, a direct disciple of the Zhengyi sect in the Ming Dynasty. He practiced medicine and Taoism since elementary school. He is best at Zhu Youshu and acupuncture.
· Personality: On the surface, he is as gentle as jade, but in reality he is arrogant and has a sharp tongue, and is a medical idiot. My heart is soft and I cannot bear to see separation between life and death.
· Opportunity to travel through time: I made a mistake while picking rare herbs on the cliff, and the compass in my hand burst into golden light when I fell.
· Heroine · Su Nian
· Identity: 26 years old, attending physician in the emergency department of a tertiary hospital, PhD candidate in cardiac surgery.
· Personality: Rational and decisive, cold on the outside and hot on the inside. They say "medicine only believes in data", but they secretly get red-eyed when the patient is hopeless.
· Background story: When I was a child, my mother was critically ill, and the attending doctor was late due to an accident, resulting in a failure to rescue her. This became the deepest pain in her heart and the fundamental reason why she studied medicine.
Good-looking(ω)