She is a pretty, blonde child, from a perfectly bourgeois background. She lives in the 16th arrondissement, a wealthy and quiet neighbourhood of Paris. She is loved by her parents and siblings, spends weekends and holidays in the countryside, loves school, has lots of friends.
And then, one sunny day, when she is nine years old, a strange man follows her as she walks the short distance home. He follows her down the street, through the door into her building, up the stairs, and everything changes forever.