The drama is a brand new black comedy. Sky Castle is a castle where the top 0.1% of South Korea's upper class live. The wives of prestigious universities gathered here regard their husbands as kings and hope to train their children into unparalleled princes and princesses. Various struggles of desire will also unfold here. Lian Jingya will play Han Ruizhen in the film. She has done a good job in the education of her two daughters and helping her husband as a good wife. She is also a highly-watched queen in Sky Castle, but in fact, Ruizhen has been hiding a secret that is unknown to the public. Lee Tae-ran will play Lee Soo-im, a fairy tale writer who is full of care and emotion. Under Ruizhen's guidance, she became the public enemy of the queens of Sky Castle, but thanks to the help of her smart son, she became the new queen for a time, and even saw Ruizhen's secret after that. Yoon Se-ah will play Lu Shenghui, who returned to be a housewife after completing her doctorate. She had strict family education since she was a child and has always been a good girl, but in fact, she hides desires and bombs that are constantly surging in her heart; Oh Nara will play the enthusiastic and lovely shopaholic Jin Zhenxi. Because her father owns a building, she has been a princess since she was a child. She regards Han Ruizhen as a role model and is busy learning her every move.