As a celebrity psychiatrist married to a successful surgeon, Noh Young Won lives the perfect life. But then, her perfect world comes crashing down when she discovers that her husband, Choi Jae Jin, has been having an affair with Lee Se Na, a mysterious woman whose sudden arrival triggers a series of tragic events. Desperate for answers, Young Won teams up with her mother-in-law, Hong Sa Gang, to save their family from utter ruin.