Summary: Suh Jin throws a lavish Sky Castle style party for Myung Joo to congratulate her for succeeding in getting Young Jae accepted into Seoul National University School of Medicine. How she did it was something all the wives of Sky Castle were dying to know. Before she leaves on a three months cruise, she tells them it has nothing to do with her son's portfolio, but a very secret gathering for VVIP customers.

Summary: Myung Joo commits suicide and leaves everyone clueless. After her funeral, Soo Chang resigns from the hospital and moves out of Sky Castle. In his place, Hwang Chi Young, a new hire appointed by the hospital's president, fills both his position and his house at Sky Castle. Meanwhile, Suh Jin finds Young Jae's diary that could explain why Myung Joo took her life.

Summary: After reading Young Jae’s diary, Suh Jin confronts Coach Kim with Myung Joo’s suicide. Knowing Coach Kim’s involvement Suh Jin fires her as Yeh Suh’s coach, but now she must find a new coach for Yeh Suh. The newest mother in Sky Castle, Lee Sue Lim, isn’t like other mothers in the neighbourhood. She doesn’t fit in with the other mothers. Her unconventional behaviours cause Suh Jin to resent Sue Lim, but Sue Lim knows of Suh Jin’s shameful past.

Summary: Suh Jin becomes anxious and restless due to Sue Lim. The book club disbanded due to the vote. While most of the members are thrilled to be free from it, few members are immensely disappointed. Suh Jin, being unable to find a new coach for Yeh Suh, has no other choice but to throw away her pride and beg Coach Kim.

Summary: After seeing Suh Jin beg, Coach Kim agrees to teach Yeh Suh again. As long as her daughters get into a good university, Suh Jin is fine with Yeh Bin shoplifting. Suh Jin even covers up Yeh Bin’s crime for her daughter’s future. Seung Hye, following Sue Lim’s advice, argues with Min Hyuk about his educational fervor and methods.

Summary: The title of Executive Director of Joonam University Hospital goes to Chi Young due to the incident caused by Joon Sang. Joon Sang may have lost the title, but his daughter beats Chi Young’s son in school grades. Everyone in Sky Castle is acknowledged and accepted, only if they are victorious. This fierce competition causes other kids to feel unwanted. This frustration causes Yeh Bin to run away from home.

Summary: Yeh Suh has beaten Hye Na in grades but is surpassed by Hye Na in different areas. Despite having an overwhelming advantage, Yeh Suh can't dominate Hye Na. If this continues, Yeh Suh will lose in the school president election as well. Meanwhile, at the Joonam University Hospital, Professor Hwang and Professor Kang are still competing.

Summary: After going away for a while, Soo Chang comes back to Sky Castle. Soo Chang has one goal in mind, find and kill Kim Joo Young. Despite having the chance to shoot Joo Young dead, Soo Chang lets her go with just a warning. After this incident, he plans to be a better father to his son, Young Jae. The only problem is Soo Chang has no way of contacting his runaway son.

Summary: Yeh Suh has won the school president election due to Hye Na’s withdrawal. Thrilled by the news, Suh Jin throws a party to celebrate and invites the other Sky Castle families. Once again, Sue Lim is questioned and bullied by others at the party about her novel ideas. Sue Lim, however, is now even more determined to finish her novel to stop any more tragedy from happening.

Summary: During a heated Sky Castle’s residents’ meeting, Sue Lim slips up and briefly mentions of Suh Jin’s inglorious past. Instead of hiding it, Suh Jin declares to everyone in the meeting of her ox blood selling past. Now the entire Sky Castle community is looking down on Suh Jin, including Yeh Suh. Meanwhile, Hye Na is clearly planning something behind the scenes.

Summary: Hye Na is brought to Suh Jin’s home as a live-in tutor for Yeh Bin. Although Hye Na is a polite, humble, and a good tutor for Yeh Bin, Suh Jin and Yeh Suh still dislike Hye Na. Meanwhile, Joon Sang is trying to get a promotion by appeasing Joonam University Hospital’s president.

Summary: Suh Jin conducts a DNA paternity test for Joon Sang and Hye Na. As she expected, Hye Na is indeed Joon Sang’s daughter with his last lover, Kim Eun Hye. Although Suh Jin is furious and wants to kick Hye Na out, she can’t be too obvious about it. Meanwhile, Sue Lim is starting to suspect Coach Kim and her motive due to discrepancies in Coach Kim’s past.

Summary: No one knows about Coach Kim’s mysterious past until now. Coach Kim’s past, however, turns out that she has a daughter and was accused of murdering her husband. Knowing this, Suh Jin confronts her about it. Meanwhile, Se Ri has been duping everyone with her fake Harvard acceptance. She has been successful so far, but Seung Hye has found out about it.

Summary: Infuriated by Coach Kim’s audacity and brazenness, Suh Jin fires Coach Kim. Even though Suh Jin tells Yeh Suh of Coach Kim’s despicable past, Yeh Suh is still fond of Coach Kim and continues to meet her despite Suh Jin’s advice. Suh Jin’s family is crumbling apart one step at a time.

Summary: During Woo Joo’s birthday party, for some mysterious reason, Hye Na falls from a balcony. She is seriously hurt and sent to the hospital. While waiting for the surgery, she passes away. Even though it isn’t enough to grieve and cry for Hye Na, the parents are trying to frame the other kids in order to save their own.

Summary: After the police investigation, Woo Joo has been arrested as a suspect for murdering Hye Na. Even though there are evidence, everyone in the Castle are doubting Woo Joo being the murderer. People also suspect that he has been framed by someone.

Summary: After a big celebration, Joon Sang comes back home drunk. Soon after his arrival, Yeh Bin tells him the truth about Hye Na. He is utterly devastated for the fact, he killed Hye Na because of his greed to fulfill his ambition.

Summary: Suh Jin and Joon Sang are certain that Coach Kim has killed Hye Na. Despite knowing this, they are unable to report Coach Kim to the police because it may ruin Yeh Suh’s life. No matter how angry they are, they have no option but to comply with Coach Kim’s plan.

Summary: Suh Jin can no longer hold in the guilt and shame of what she has done. For her conscience and her daughter’s future, she confesses to the police of what she and Joo Young has done. With this confession, Suh Jin’s family can start again in the right direction.

Summary: Kim Joo Young is apprehended and is going to pay for what she has done. The families of Sky Castle are changing from what has happened. Some are walking away from their prestigious job, some are quitting their education, and some are letting go of their pride and greed. The tragedy of Sky Castle ends, and a new start begin for them.