France, 2039. One night, a group of activists pursued by the state vanish without a trace. Julia Bombarth is one of them. When she awakens, she finds herself trapped in an entirely unfamiliar world: PLANET B.
慈祥的老祖母米歇尔（海伦·文森特 Hélène Vincent 饰）在勃艮第乡下安享着平静的晚年生活，她最好的朋友玛丽-克劳德（若西安·巴拉斯科 Josiane Balasko 饰）也住在附近。但当她的女儿瓦莱丽（露德温·塞尼耶 Ludivine Sagnier 饰）把孙子卢卡斯送来过秋季假期时，一切都偏移了正常的轨道。
