The main character, Mi-rim, stuck in an unhappy life with a part-time job and no friends, starts random video chats with the camera off by pretending to be rich. One day, she meets Yoo-jin, her lookalike living a happy, wealthy life. Yoo-jin, stylish and radiant, lives in a fancy house and has a handsome boyfriend. Yoo-jin suggests to Mi-rim, who envies her, that they swap lives for a month.
