The First Night with the Duke S01E10 - Who Is the Accomplice?

Su Gyeom confronts Eun Ae, asking if she's the one who wrote the letter that led Seon Chaek into the trap. Determined to clear her name, Hwa Seon decides to find the real culprit herself. Bun presses Eun Ae to reveal who her accomplice is, but she refuses to give in easily. Seon Chaek asks Yi Gyu to step in and help Bun out of his predicament.