Eden,a 25 years old doctor. She is the only child of Hangang Group,the biggest company in South Korea. As the only child,she has to be prepared to takeover the company,but she never expected things will turn out that way. She has no idea that she will be the heir of the company. Her parents never imagined it too. They only rely on their son,Park Ji Yoo. He was supposed to be the next CEO but something happened that caused his death. Everyone blames Eden for that. Her childhood was once full of happiness and love from her family and those around her. After her brother's death she has no idea what is happiness and what is the purpose to live.

Baekhyun of EXO is a popular kpop star. Everyone has their eyes on him and he is known for his bright personality backstage and onstage. Some days he wants to be free from his popularity. So he decides to hang out in Hangang Park alone every friday nights. No one notices his presence there because everyone's busy with their dates or families. He chooses the best spot which is far from the crowds.

On one friday night,Eden is walking through hangang river. There she meets Baekhyun whom she thought was a suspicious guy because of his outfit. Baekhyun thinks of Eden as a sasaeng and pretty much pissed by her presence. In fact,they are better person in real life. After a ruined friday night,they keep encountering each other until they realize one important thing that no one told them about.