25 years ago, Haesung group lost their grand daughter Choi Eun Seok. The girl was found and raised by Seo Tae Soo as one of his twin daughters Seo Ji Ahn and Seo Ji Soo, They grew up rich but their father bankrupted and they had to experience the hard life of a dirt spoon. Ji Ahn now is a contract worker at Haesung group who would do anything for a job while Ji Soo is an air headed part timer who has a one sided crush on Sun Woo Hyuk, Unknown to her that Woo Hyuk was in love with Ji Ahn in high school.
Choi Do Kyung is Haesung Group oldest grand son, he is gentle and kind but being too good yet still single makes his employees spread weird rumors about him, he meets Ji Ahn in a car accident and comes to know her sad situation but his biggest shock is when his mother reveals that his lost sister is Ji Ahn.
Go Joo Yeon is a self-centered star actress who has always gotten what she wants: fame, money, and even good-looking young boyfriends. However, now in her 40s and with her acting career going downhill, she wonders whether she should settle down with her secret boyfriend, who is 12 years younger than her. However, the boyfriend, a rookie actor, is only interested in taking advantage of her fame, cheating on her behind her back. Discovering the truth, Joo Yeon is devastated that she has no one who she can truly rely on. So she decides to have someone definite in her life, her own baby.
She goes to see an obstetrician only to learn that she has reached menopause. While facing the depressing truth, she comes across a pregnant teenager Kim Dan Ji at the hospital. Joo Yeon makes the offer to Dan Ji that she will adopt the baby at whatever price, and will support her until she delivers. Dan Ji, who needs the money, accepts the offer and agrees to stay hidden at Joo Yeon’s home. When Joo Yeon makes a press announcement of her pregnancy, in vengeance against her ex-boyfriend, who has become a rising star, rumors start to spread about who the father is. She declares that she will be a single mom and her dignified demeanor earns her numerous jobs making her more successful than ever. Dazzled by the new phase in her career, Joo Yeon begins to neglect Dan Ji, but worse, people are now getting suspicious.