Seo Jun Gyeong is single and works as an OB-GYN. She appears to have a perfect life, with a good job and attractive appearance, but, Seo Jun Gyeong is actually a very lonely person. She holds a secret that she is afraid to admit. Her secret is that she ran away from her family 7 years ago, due to an accident that caused her family to collapse. To keep her secret from being disclosed, she struggles to live more fiercely and confidently. A man then appears in front of Seo Jun Gyeong. He is the only person to learn about her loneliness.