Twin sisters Yoo Mi Ji and Yoo Mi Rae are different in everything except their faces. Yoo Mi Ji the younger of the twins, has ended her short heyday as a promising track and field athlete and is currently living a free-spirited life. On the other hand, the older sister of the twins, Yoo Mi Rae, has been walking the path of the elite since her school days and is currently a perfectionist working at a public corporation. The twins, who are physically identical but lead starkly different lives, embark on a bold charade, switching lives for some undisclosed reason. Lee Ho Su is a lawyer at a large law firm with a tall appearance and a seemingly carefree attitude. He may look like a noble swan with no flaws on the outside, but he works harder than others to live an ordinary life. This is because he has been living a different life than before after experiencing something in the past. As a result, he lives a calm life without showing his true feelings, but one day, an unexpected encounter occurs that sends waves through Ho Su's heart.
