One day, I suddenly received a message from someone I didn't know. The sender's name was Lee Hyang. When I searched it, I found it was the birth name of King Munjong, the 5th king of Joseon. A king who suffered from nightly fevers and unceasing coughs. As an internal medicine resident, I sent him a reply. But after that day, the Annals of the Joseon Dynasty began to change in real-time.