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 Ki-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 Ki-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.