In an orphanage, the twin sisters made a sacrifice years ago. The younger one gave up adoption by a wealthy family to ensure her sibling with a heart condition got a chance at a better life. As adults, the older sister, now a wealthy heiress, sets out to find her missing sibling. The younger sister, meanwhile, faces hardships in her in-laws' home where she's deceived and ultimately meets a tragic end. Her older sister is determined to right all the wrongs her sibling suffered through.