Yoo Ga Eun carefully plots her revenge after being betrayed by her husband and best friend.

This drama is about the life of King Jeong-Jo, Joseon’s 22nd Monarch, who is remembered in Korean history as one of Korea’s greatest Kings who loved the people and reigned for the commoner.

Yoon Seok Joo is a producer who abandons his common law wife, Seo Young, to attain success. They have a daughter together but he later betrays Seo Young when he marries a rich man's daughter, Lee Jung Min. Lee Sang Min is an owner of a film company and is a new film director. He is also Jung Min's half brother. Sang Min will be a rival to Seok Joo in work and in love for Seo Young. Yoon Hyun Joo lost her dad at a young age and went through serious hardships and became a successful architect and is Seok Joo's sister. This drama is also about the lives of five siblings.

Shin Na Ra, a woman who is almost thirty welcomes her boyfriend of ten years back from his business trip. During their dinner, he tells her that he not only had an affair but fell in love with another woman. Thus their relationship is no more. To make herself feel better, Na Ra drinks a large amount of alcohol and unknowingly dropped the ring her ex-boyfriend gave her into a random stranger’s cup. The stranger, In-Jae, drinks the shot without seeing the ring and both of them end up in the hospital.

To support herself, Na Ra pretends to be her 20 years old sister in order to work as a cosmetic clerk at Mi-Rae (the woman her ex-boyfriend fell in love with)’s shop but fate has brought In-Jae to the shop to. Thus began their surprising journey of love, where In-Jae is in love with Mi-Rae too.

The main chracter is Yu Hyechan who is 29 years old.Hyechan is married to Kang Bongman who is her old classmate in high school whom she despised and hated because of his cocky attitude.But later she fell for him after being rejected by Shi Woo her crush.

This drama takes the audience back to the 1990s. The main character of the drama, Yu Hyechan, 29, reverts mentally to an 18-year-old girl after having a car accident. As she recovers her memory and the relationship with her husband, Kang Sang-yeong, she goes through many hilarious and heart-moving moments. -- KBS Global Marketing