Kang Jae In is the youngest leader for a design team at YL Group and she comes from a wealthy family. She is married to Hwang Gi Chan, who works as a director at YL Group. Her life seems so ideal that she is the envy of many people. Nevertheless, Kang Jae In dreams of an ordinary and simple life, unlike her ambitious husband Hwang Gi Chan. An incident leads to Kang Jae In’s life changing completely. Meanwhile, Kim Do Yun is an excellent thoracic surgeon. He is warm-hearted and easygoing, but he loses someone precious to him all of a sudden. He vows to take revenge.