Yoo Mi-Ji (Park Bo-Young) and Yoo Mi-Rae (Park Bo-Young) are identical twin sisters, but they are different in everything except for their appearance. Younger sister Yoo Mi-Ji ended her short heyday as a promising track and field athlete and she now lives a freewheeling life. Older sister Yoo Mi-Rae is a perfectionist. She has been on an elite path since her school days. She currently works at a government owned company. For some reason, Yoo Mi-Ji and Yoo Mi-Rae begin to tell audacious lies about exchanging their lives. They then swap their lives. Meanwhile, Lee Ho-Su (Jin Young) is a lawyer and works for a large law firm. He is good looking and carries a carefree attitude, but he has been working extremely hard to have a normal life. Something happened in his past and that changed his life. He has an unexpected encounter with Yoo Mi-Ji and Yoo Mi-Rae. This leads to Yoo Mi-Ji, Yoo Mi-Rae and Lee Ho-Su finding their real selves.

Source: AsianWiki