"Will you stay loyal to me?" Jae-hee devises a scheme to make Jun-hyuk. Jae-hee provokes Han-sook, who proposes a deal to her, offering her the key to the secrets of the Sungjin family. It's a dangerous gambit, where success would not result in great benefit and failure would ruin her life for good. Despite the unfavorable terms, the key stirs up the greed and ambition deep inside her heart.

Jae-hee is shocked to see the dead body of Min-sun, and Han-sook uses Min-sun's secret against Jae-hee and corners her.Jae-hee starts questioning Ye-rin, even using violence. Jung-ho, who has been investigating the death, finds a crucial piece of evidence to change the situation. Jae-hee has only one day, one chance to make a move against Han-sook and get herself out of trouble.

Han-sook cannot stand the feeling of ridicule as Jae-hee treats her with disrespect. Jun-hyuk makes progress in securing a position in the Blue House. Feeling threatened by Jae-hee's success, Ju-yeon works together with Han-sook to devise a plan against Jae-hee. Jae-hee finds herself trapped and unable to find a solution. Han-sook is swayed to see Jae-hee put a gun against her own head.

"I'm interested in Mr. Jeong Jun-hyuk." Jae-hee is baffled at Yi-seol's provocative words. Jun-hyuk asks her about Yi-seol, and she is now noticing and bothered by Yi-seol. Han-sook promises Jae-hee directorship of Art Space Jin, the art gallery, and gives her the shares that she wanted. The two are now working together, but their relationship is not very positive or cordial.

As Jun-hyuk is about to be appointed the Secretary of Civil Affairs, Jae-hee tries to cover up the truth of the death of No Young-ju. Jung-ho has suspicions about No Young-ju's roommate, and Jae-hee tries to avoid discussing the matter.Jae-hee finds a shocking video in Sungjin's secret files. Will she be able to handle the unbearable truth?

Jae-hee, who once believed that No Young-ju's death was a suicide, has a feeling that someone else might have been behind it.Gang-hyun tries to stop Jae-hee from becoming director, and Jae-hee makes a plan to bring him down from power. Jun-hyuk sees Yi-seol and Dong-min meeting privately and finds himself unable to keep his eyes off Yi-seol's unpredictable behavior.