Documentary about the life and work of the architect Paulo Mendes da Rocha, told by him in prominence for Joana, his daughter. With more than 80 years of age, Paulo Mendes is today one of the most important and renowned architects in the world, but, above all, he is a thinker who has controversial ideas and opinions about urbanism, nature, humanity, art and technique deserve to be heard. In a constant dialogue between interviewee / father and interviewer / daughter, Joana is the guiding thread of the film. As in all personal relationships, especially between parents and children, the thread that leads is also that which is conducted.