Gripping feature film based on the novel by French author Delphine de Vigan. The crib death of her baby brother has dramatically changed the family life of 13-year-old Lou. Ever since, the highly gifted girl likes to spend her afternoons at the train station to observe people. When she has to deliver a lecture at school, she chooses to interview a homeless girl who is only a few years older than herself. This is to be the beginning of a special friendship.