爱丽丝·朗丹（维尔日妮·埃菲拉 Virginie Efira 饰）是一个38岁的单亲妈妈，她很漂亮而且上进，但是在前夫眼里她很无趣，因此她全身心寄情于杂志社的工作。爱丽丝本来有资格成为下一任主编，可是上司和同事纷纷觉得她的形象太老气和刻板，无奈的她心灰意冷。一次坐飞机途 中，她巧遇了刚满20岁的年轻帅小伙巴尔塔扎（皮埃尔·尼内 Pierre Niney 饰），两人在一起的时候被同事看见并误会她搞起了时髦的姐弟恋，因此他们对她的态度也转变了。爱丽丝觉得这个意外是她升职的关键，于是主动开始了勾引巴尔塔扎的计划，本是无心的相遇却变成了愈演愈烈的纠葛。The thirty-eight year-old ambitious and workaholic editor of the fashion magazine Rebelle Alice Lantins returns from Brazil to Paris and loses her flash memory in the airplane. However, the student of architecture Balthazar Apfel finds it and calls Alice to tell her. She schedules a meeting in the bar where Balthazar is drinking with his friends but he tells her that the device is at home. He offers a ride in his scooter to Alice and while he is putting the spare helmet on her, two coworkers of Alice see from an angle that make them believe that Balthazar is kissing Alice. They take a photo and posts it in the Twitter. On the next morning, everybody is laughing at Alice but the chief editor and her boss Vincent Khan loves the idea that Alice is dating someone twenty years younger. Alice decides to impersonate that she is in love with Balthazar to get a promotion in the magazine. But soon she learns that she should not trifle with love.