Hong Ra On, disguises herself as a man and counsels men on dating. Due to a love letter she wrote for a client, she meets Lee Young - future Crown Prince Hyomyeong. Hong Ra On is unaware that he is the Crown Prince and Lee Young is unaware that Hong Ra On is a woman. The Crown Prince becomes interested in Hong Ra On. His eunuchs become aware of this and attempt to get Hong Ra On to become one of them.

Kwon Si-Hyun bets his life on a dangerous game to seduce Eun Tae-Hee. His target is 20-years-old and believes people that are swayed by love are pathetic. After Eun Tae-Hee meets Kwon Si-Hyun, her view on love changes. Based on 18th century French novel "Les Liaisons dangereuses" by Pierre Choderlos de Laclos.

Take a nostalgic trip back to the late 1980s through the lives of five families and their five teenage kids living in a small neighborhood in Seoul.

Set at a prestigious private high school in Gangnam, Seoul, South Korea. Eun-Byeol is a popular student at the private high school. She goes missing and returns, but she has lost her memory. She tries to find out the truth.

Two childhood friends grow up supporting each other through the difficulties of poverty, then meet again years later and stand by each other as they rise through the ranks of society. After marrying into a wealthy business family, Kim In Sook's life becomes a living hell. Seen by her in-laws as a gold-digging intruder, she is pushed to the margins. When her husband is killed in a helicopter accident, her mother-in-law takes away In Sook's beloved son. Enter Han Ji Hoon, an old friend of In Sook, and powerhouse new family lawyer determined to put a stop to In Sook's mistreatment. In Sook finally retaliates by launching a bold plan to take over the family company, and Ji Hoon supports her no matter the cost. In the midst of their battle for survival, their hearts are drawn together in a passion that could end up costing them everything.