故事讲述40多岁的米拉在巴黎生活了20多年。刚和法国丈夫离婚的她,决定去韩国,见到了20年前上过戏剧课的老朋友杨恩和宋宇。当米拉在酒吧里度过快乐时光时,之后去了一趟洗手间,当她回来时,时光倒流回20年前。这是米拉出发去法国前的告别派对。在弄清楚是否是米拉的幻觉之前,她经历了一系列神秘的事情。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. Before figuring out whether this is all Mira's illusion or not, she goes through a series of mysterious reversing time sip.