Mira in her mid-forties has been living in Paris for more than twenty years. Having just divorced her French husband, she impulsively decides to visit Korea and meets her old friends Young-eun and Sung-woo who had lessons of play 20 years ago. While having cheerful times in a bar, Mira goes to a toilet and when returns, time has reversed twenty years. It is the day of Mira's farewell party before she sets off for France.