When a mother looks in wonder at her new baby, little does she imagine that fifteen years later her tiny one will be a rebellious teenager, defending his or her ideas with conviction, listening to loud rock music, reading novels shut in the bedroom and experiencing the first pangs of love.

During the first fifteen years of life, such a great distance is covered, so many physical and psychological transformations take place.
This tiny man, forty centimetres long, lying on its back gurgling and gesticulating in an uncoordinated manner, has been transformed into a strapping lad 1.80 metres tall, with a deep voice, running on a football field with his mates.
The little girl sleeping soundly in her crib listening to nursery rhymes has become a curvaceous high school student, with a passion for abstract painting, who loves spending her Sundays reinventing the world with her girlfriends.

This film will lead us on the fabulous adventure that takes us from infancy to adolescence, from the first awakening to the world, the mastering of movement, through the learning of language, socialisation, education, to the first physical and psychological signs that mark the passage from childhood to adulthood.

The physiological mechanisms that determine our spectacular development in these first fifteen years of our life will be revealed from the inside, thanks to the latest technologies of medical and scientific imagery.
The social, cultural and emotional environments that shape our psychological development will be treated with humour, using excerpts from films, advertising spots or visual sketches.
The world’s foremost specialists will contribute to each of the sequences exploring new facets of the subject.