The concept of an arranged marriage is often difficult to accept, especially amongst less traditional adolescents today. Sweet 18 (Nang Rang 18 Seh) covers this very premise and the story begins when Kwon Hyuk-joon's grandfather, the head of the traditional Kwon family agrees to an arranged marriage between his grandson (Lee Dong Gun) and Yoon Jung-sook (Han Ji Hye) when Yoon Jung-sook is born. 18 years later, the two families lose contact because soon after the contract is signed, Jung-sook's family encounters ...