拉斐尔与奥莉薇亚在高中一见钟情。奥莉薇亚弹得一手好钢琴，而拉斐尔打算写科幻小说。经过十年幸福的婚姻生活之后，拉斐尔成了所谓的一位畅销作家。被眼前的成功冲昏了头脑，拉斐尔变得自大而虚荣，感到自己与奥莉薇亚的距离越来越远。在拉斐尔与奥莉薇亚发生激烈争吵之后，他醒来发现自己成了平行人生里的一名中学乒乓球老师，每日与自己的发小厮混在一起。拉斐尔开始意识到奥莉薇亚才是他的一切，决定不惜一切代价赢回奥莉薇亚的芳心。而在这个平行世界里，奥莉薇亚是一位世界著名的钢琴家，从未见过拉斐尔。
Paris, 2009. Raphaël is a high school student who pass the days with his best friend Felix at the same time that he tries to end his first Sci-Fi novel when by chance he meets Olivia, another student fan to play piano. After a first magical encounter between them, Raphaël finds in her the inspiration to end the novel. Ten years later, 2019, the novel have been turned in a famous Sci-Fi saga and Raphaël in a best-selling writer with a successful career including apparitions in TV and Internet. Therefore, he turned in a man full of himself without space for any other, and the marriage with Olivia is each time more cold and distant. After to finish his last book and talk with Olivia about to end the relation, they both go to sleep. To the next morning, Raphaël wakes up to find himself in an alternate reality: he works as teacher in a public high school of with the too teacher Felix, is related with Mélanie (another teacher of his school), his career as writer not exists, and Olivia is a famous pianist that doesn't recognizes him. Unable to accept this new world as real and without the remembers of these alternate ten years, Raphaël tells Felix the truth asking him help to know how was his life in this alternate world. Wanting to turn back and recover his previous life, Raphaël finds a possible solution: recover Olivia making that she fall in love him again. Pretending to be a ghost writer of celebrities' biographies interested on her, Raphaël meets Olivia to know her history, but then he discovers an unexpected trouble: Olivia has engaged to her agent, Marc. If Raphaël doesn't hurry, it's possible that he never can recover the life that he had.
