The Sagrada Família in Barcelona: a unique, fascinating building project with a brilliant architect, Antoni Gaudí, a huge number of participants and a history full of abysses and high flights. The biography of this building, which has been under construction since 1882 and is now well over half finished, is the starting point for a film about this mysterious process of "creation", about the question of our human creative power - and what we want to use it for.