It all started with football. Deok-hoon falls in love with In-ah who shares his love and passion for the sports. They quickly become lovers and he proposes. She refuses at first but they are eventually happily married. Marriage is like a dream until one day In-ah declares her wish to marry another man. She doesn’t want divorce as she loves Deok-hoon all the same, only change is that she loves the new man as much. Leaving Deok-hoon who finds himself unable to leave In-ah in the middle, she goes ahead and marries her new man. And so the bizarre bigamy begins.
Choi Jung Soo (Shin Don Wook) was left in an orphnage by his father who could no longer take care of him after his wife left him for another man. He had a bright future in medicine but could ill afford the tuition fee. In despair, he took off to the remote island where his father grew up in the hope that he would find him there. He ended up spending 7 years there working under the guidance of the island's only doctor and became very good at it. But when he saved Yoon Jung Won (Han Ji Hye) who suffered from an acute appendicitis, he became mistaken as a skillful doctor and his life became complicated. YJW was the daughter of the owner of an elite hospital in Seoul and the two began to develope feelings for each other even though she was engaged to be married. He couldn't help falling in love with YJW and began to lie to himself and others about his medical credentials. The higher he rose, the harder he fell. The love that he thought would give him everything turned into poison. He lost his world … except the love of his woman who stood by him no matter what.
This drama is about the lives of Tae-hee and Yun-hee, two sisters whose mother died while giving birth to Yun-hee. Their father, who loves them dearly, married their mother without their paternal grandfather's consent, and deprived of any familial support, the sisters and their father struggle to make ends meet even as their father faces a life-threatening illness. This drama follows Tae-hee and Yun-hee into adulthood as, separated by a cruel twist of fate, the girls come to lead very different lives, oblivious of one another.