Hwang Eun Byul (Ham Eun Jung), a ghostwriter for a publishing company, and Hwang Geum Byul (Lee Joo Yeon), a leader for the PR department at a fashion company, are fraternal twin sisters, but their mother has always favored Geum Byul. The sisters end up marrying into rivaling families, and the story follows them as they try to work through their conflicts with communication and a positive attitude.