Ji Dam asks for the Crown Princess' permission to help the Crown Prince on the investigation. Ji Dam helps in trying to find the culprit who killed Kang Pil Jae. Meanwhile, the king commands Kim Taek to bring the culprit who switched the written pledge while Kim Taek tries to make a deal in getting the real written pledge back...

The king warns the Crown Prince about letting his true feelings show to others if he wants to hold onto the title of Crown Prince. Both the Norons and the Sorons are nervous about how the Crown Prince has been acting. Meanwhile, the king is angry about a book that has been circulating in the palace.