A family drama that portrays the work and romantic relationships of young people. Go Eun Nim works hard at her part-time job and stays cheerful to support her family, which includes Choi Joon Young and his mother, who suffered after marrying the wrong man and was taken in by Eun Nim's grandmother. Joon Young grew up with Eun Nim like siblings, but slowly begins seeing her as a woman. Lee Se In is the opposite of Eun Nim, with brains, looks and wealth as the heir of a business, but is selfish and spoilt. He uses studying in the U.S. as an excuse to play around. Hong Joo Mi is the picture of perfection; proud, confident and beautiful, she's the youngest team leader at Chairman Lee's company. She has walked her whole life on the path of the elite, from elementary school to her career, and is unused to failure.
Three months before the presidential nominating convention, Jang Il Joon, from the New Wave Party, declared his candidacy. On that same day, a woman died in a gas explosion in Sam Chuk. Yoo Min Ki, a documentary producer, heard of his mother's sudden death and headed back home. As he cast his mother's ashes in the sea, he thought of his childhood: his father always blurted out that Min Ki was not his son whenever he was drunk. After the funeral, Min Ki returned to Seoul and Jang Il Joon asked Min Ki to work as a PR agent to record the election campaign process. When Min Ki asked Il Joon why he was chosen, Il Joon confessed that Min Ki was his son. Min Ki soon begins to suspect that his mother's death was not an accident and that Il Joon had actually killed her.