Han Yoon-jin (Actress: Park Shi-eun)

She has one sibling and grew up as the eldest. Her family owned a small Chinese restaurant in a poor district in Seoul. Having a single parent made her childhood a difficult one, but she retained a sunny personality. Her supposedly best friend Sun-jung sets her up on a blind date with Joo Hyun-do and despite his family’s disapproval, they get married. But during Yoon-jin’s month-long hospitalization after the dif ficult birth of her first baby, her best friend Sun-jung has an affair with her husband and steals him away, wrecking her marriage. Yoon-jin wa n t s t o get revenge but there are so many broken pieces to pick up in her life that she does not know where to begin.

Choi Sun-jung (Actress: Kim Bo-gyeong)

Sun-jung grew up in a wealthy family. Being a smart and pretty girl, she was popular among her classmates. But at the age of 14, Sun-jung witnesses her father kissing Yoonjin’s mother. After this incident, Sun-jung becomes consumed with rage and vengeance. She starts to believe that nobody is on her side in the world. Studying diligently, she gets into a prestigious college and later lands a job where she proves herself to be a capable and talented employee. She dates Baek Jae-heon, whom she thought was from a wealthy family, and is determined to marry him. After she belatedly finds out that Jae-heon was a c t u a l l y the live-in private tutor for the family’s children, she decides to seduce Joo Hyun-do, who is the scion of a successful furniture company.

Baek Jae-heon (Actor: Ahn Jae-mo)

Although his family was so poor that couldn’t af ford to send him to cram school, he studied and worked hard while being raised by a single mom. He never despairs over setbacks in life. Perhaps his hardworking philosophy was the factor that drew Sun-jung, whom he had a crush on, to him. During his mandatory military service, he anxiously waited for the day he could be reunited with Sun-jung and be with her during her pregnancy. When Jae-heon is finally able to go home after being honorably discharged from the military, he is greeted with bad news. His baby was abandoned at his home’s doorsteps, and a note says that Sun-jung died while giving birth. He raises his daughter by himself as a single dad, but one day he is shocked when he sees Sun-jung alive.

Joo Hyun-do (Actor: Hwang Dong-joo)

While his father gives him a hard time, his mother spoils him so Hyun-do gradually became impulsive and selfish. He also would get into trouble at times. Marrying someone his family didn’t approve was troubling to his parents. When Hyun-do asked Sun-jung, whom he had a crush on, out on a date, she flatly turns him down but decides to set him up with a blind date with her friend Yoon-jin. So getting married to Yoon-jin was an act of defiance against his father and exacting sweet revenge against Sun-jung who had snubbed him. While Yoon-jin was still in the hospital due to a dif ficult delivery, Hyun-do started thinking about Sun-jung as the one that got away but who was now eager to hook up.