Caroline Gardel, a divorced woman, is the mother of Fanny Gardel, a 17 years old adolescent.Caroline is chief education adviser in the college where her daughter Fanny is studying.During their last holidays Caroline has met Hugo, and now Hugo has arrived at the college to investigate a case of drug dealing.Fanny is taking pictures of a handsome adolescent called Mathis.Fanny has arrived very late to the classes and the principal of the college is quite angry about it.At the end of the day Caroline and Fanny go back to their house by car.Caroline stops the car, there is a great lightning touching the car.After a moment of silence Caroline appears in the body of Fanny and Fanny appears in the body of Caroline.