A nobleman bribes a maidservant to gain access to the palace and poison the crown prince. Another noble, loyal to the royal family, learns the of the plot and must learn the identity of the would-be assassin before he can succeed in throwing the country into chaos.

Oh starts working at a boutique to help her make a living. Professor Jang begins dating the typist Miss Park, but decides to break up with her to protect her family. Han's wife anonymously sends a letter to Jang to reveal Oh's affair.

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