一头扎进历史研究几十年的约瑟芬，在优雅漂亮、光芒四射的姐姐伊丽丝面前简直一无是处：父母不疼、姐姐不爱、女儿不尊、丈夫干脆和情人私奔到非洲养鳄鱼。
　　某个上流社会的例行晚宴上，伊丽丝谎称正在写一部历史小说，在场的出版商立刻向她表达了出版意愿，实在写不出“杰作”的伊丽丝被迫向约瑟芬求救。碍于经济窘迫，约瑟芬同意捉刀，孰料作品一经面世竟令整个巴黎沸腾，也将姐妹俩的人生彻底颠覆……

Astrid Nielsen, works in the library of the judicial police. Suffering from Asperger's syndrome, however, she has an incredible memory, so she is very useful in analyzing the files for ongoing investigations. The district commander, having noticed this ability, decides to use it to the fullest, entrusting her with very complex investigations which have remained unsolved to date. In addition, also to reciprocate, he will try to help Astrid on the behavioral side, in order to provide mutual help.

一个男人想和女友组成一个完整的家庭，但女友却无法怀孕，这位男性决定让自己来承担这个责任（生孩子），因为ta之前是一个女人