A last-minute change of heart gravely injures Hee-soo — prompting questions around her gender. Later, Yi In reveals the fate of her father to her.

In a vulnerable moment, Lee In shares the secret of his ascension with Hee Soo. Jong Hwan plans a counterattack for Lee In's investigation of past events.

After Senior Court Lady Dong's tragedy, Lee In aims to punish the one responsible. Queen Dowager Park finally learns the truth about Hee Soo's gender.