Oh Ha Na is a lowly policewoman who lacks a sense of duty and believes that it is worth bending the rules in order to achieve your aims. She meets and begins to investigate Go Jin Hyuk, an elite intelligence agent, and they clash instantly based on their different morals. Their initial dislike of each other masks their romantic attraction, but this development is hindered by the existence of Choi Eun Seo, Jin Hyuk's first love.

Ryu Jin and Go Eun Mi are a married couple who try desperately to conceive a child but are unsuccessful. They turn to surrogacy and this is where Go Eun Nim comes in. She is their surrogate mother carrying their child but things become complicated when she later marries Ryu Jin's younger brother played by Jung Gyu Woon.

Jung Ha Yoon is a graduate student who successfully passed the bar exam. However, she is not finished as she wants to be a medical malpractice litigation specialist. She works at a hospital to look to gain experience and there she meets other doctors who work there.

Na Yu Kyung is the owner of a book store and she is also a lobbyist. This drama is based on the novel “Sad Story of the Capital (경성애사, 京城哀史)” written by Lee Sun Mi (이선미). It portrays a love story that happened in the 1930s. Sun Woo Wan is the youngest son of a rich and famous family and he is involved in the independence movement. Lee Soo Hyun is a Chosun person, who rises amongst the ranks of the government and Cha Song Joo is a famous bar hostess in one of the top class restaurants.

Yeo Bong Soon (Eugene) leaves her mountain village and comes to Seoul to live and look for her parents after her foster 'grandmother' passes away. She finds a job as an assistant cook at the President's Blue House canteen and later, in the Blue House kitchen. She falls for Jang Joon Won (Ryu Jin), the President's son, a highly intellectual doctor; however, he is married with a five-year-old daughter. His wife is suffering from dementia. As Bong Soon finds herself falling in love with Joon Won, a love triangle builds up when Bong Ki (Lee Min Ki), the President's family's bodyguard, starts to fall for the hillbilly Bong Soon! The drama explores about how Bong Ki gets in touch with his own feelings and how Bong Song's generosity makes the men fall for her.

"Sodongyo" is said to be one of Korea's oldest folk songs. According to Samgukyusa (The Memorabilia of the Three Kingdoms) from the Silla Kingdom, the song was written by Sodong, a commoner from the Paekche Kingdom. Hearing that Princess Sonhwa, a daughter of King Chinpyong of the Silla Kingdom was beautiful, he writes a song saying that the princess visits Sodong's room every night and spreads the song around. When her father hears the song, he condemns the princess to exile. Sodong picks her up and takes her to Paekche, and they become the royal couple of the country.

Oh Pil Seung is a free-spirited, but somewhat lazy regular joe who suddenly finds himself heir apparent to a top-level logistics company! With rivals and detractors simply waiting for him to foul up, will Pil Seung be able to rise to the challenge? Or will white-collar intellectuals and their snobby ways force this blue-collar everyman out?