Yeonwoo is the richest and most successful man, he runs a very famous and successful company. You used to be lovers, but without you realizing it, your relationship had crossed the line and made you pregnant. you felt embarrassed because you were pregnant with him without marriage, so after giving birth you left your baby (Jaehyan) in front of Yeonwoo's residence, then you leave and forget them. And now Jaehyan is 4 years old