Haechi - Season 1 Episode 39 Curing the Plague
Overview: The king visits the patients at Hwarinseo and consoles them. The riot is prevented. Moon Soo is pursuing Byeong Joo and finds out that he contacted a guard of the Cheongju armory. The king orders a prescription based on the past Cheongju epidemic, and the patients begin to recover. Queen Dowager also recovers from the disease.