A turbulent twister of lies, betrayals and revenge tears apart the seemingly picture-perfect marriage between a doctor and a filmmaker.

Set in the 18th-century Joseon, it tells the story of Crown Prince Lee Sun and his fight against a powerful and wealthy organization Pyunsoo hwe, who controls the country behind the scenes. He becomes a hope for the people who suffer from lack of water due to the greed of Pyunsoo hwe, who tried to privatize the nation's water supply. With the help of the woman he loves, Ga-eun, Lee Sun overcomes adversity and grow as a just ruler.

The son of a North Korean spy decides to follow in his father's footsteps to protect his little sister. After his father’s botched espionage mission, North Korean Myung-hoon and his young sister Hye-in are sent to a labor prison camp. In order to save his sister’s life, Myung-hoon volunteers to become a spy and infiltrates the South as a teenage defector. While attending high school in the South, he meets another girl named Hye-in, and rescues her when she comes under attack. South Korean Intelligence soon discover Myung-hoon’s activities and begin tracking him, all the while his own government sends a vicious assassin to eliminate him.

The story is about a boy, Lee Sin, who is popular in his High school for his band team- "The Stupid", and a girl, Lee Gyo Won, from the same institution, who is devoted to traditional Korean music. Lee Sin's father, Lee Hyun Soo was a popular guitarist during his time but is now in the verge of death because of drug addiction; which was also the cause of his separation with Song Ji Yeong (Lee Sin's mother) a long time ago. The female lead, Lee Gyo Won's grandfather, Lee Dong-jin is one of the top 3 traditional musicians of his age and his biggest wish is to see his granddaughter become a traditional music prodigy. He is strictly against modern music because he believes that it misleads the tradition. The high school comes up with "The 100th Year Anniversary" where students get the opportunity to show their skill. Now, will Lee Sin be able to prove his skill in modern music like his father did? And will Lee Gyo Won be able to keep up her grandfather's expectations? Or something else is...