Seo Jin runs into Young Jae and tries to talk to him. Soo Im ponders what to do about Ye Bin. Noh Seung Hye and Min Hyuk scramble to formulate a plan B.
Seung Hye challenges Min Hyuk head on. Seo Jin thinks that she's fixed things but doesn't count on Kang Joon Sang. Ye Bin finds an unlikely confidante.
Soo Im and Ye Bin are stunned by what they uncover. Seung Hye and Soo Im speculate about Young Jae and his family. Kim Joo Young puts Ye Seo in her place.
Kang Joon Sang delights in Seo Jin's plan to host a dinner as an occasion to gloat over the other couples, but things get heated over Soo Im's new book.
Seo Jin incenses Kim Joo Young with her reply, and leads the charge against Soo Im, but pays a heavy price for her shortsightedness in more ways than one.
Seo Jin relents and has Hye Na move in as Ye Bin's tutor, but makes a startling discovery. Soo Im meets Young Jae's father to get his side of the story.
Soo Im hears a strange fact about Kim Joo Young. Seo Jin's fury boils over. Min Hyuk basks in his daughter's stories, but Seung Hye spots something odd.
Not caring if Woo Joo is sacrificed, Seo Jin begs Kim Joo Young to save her daughter, but Ye Seo insists he's innocent. Soo Im infers a sinister motive.
Joon Sang reproaches Seo Jin and his mother about Hye Na. Seo Jin has harsh words for Kim Joo Young but has only one thing on her mind: Ye Seo's future.
Joon Sang wants to go to the police and exonerate Woo Joo, but Seo Jin won't let him. Seung Hye doesn't want to live with Min Hyuk and the kids concur.
Soo Im pleads with Seo Jin, who remains determined. Ye Bin tells her mother what she thinks of her. Woo Joo wants to know why he should forgive Seo Jin.
Woo Joo announces he's taking a break from school. Joon Sang resigns and Seo Jin readies to leave SKY Castle. Seung Hye prevails and Soo Im's book comes out.