Ji Sun Woo, a successful family doctor and associate director, seems to have a perfect life in Gosan with her husband, Lee Tae Oh, and their teenage son, Joon Young. She supported her husband in starting his entertainment company, and they appear to be a happy family. But everything changes when she discovers his affair — and that their friends are helping him hide it. Heartbroken and betrayed, she begins a journey to take revenge and rebuild her life.