The story of SAAL, Serviço de Apoio Ambulatório Local (1974 - 1976), a movement launched after the revolution by a group of architects in response to the street struggle of poor residents who, in the hot summer of 1974, shouted “Houses Yes! Shacks No!”. 
While in Lisbon the SAAL operations took place in suburbs and recently urbanized slums, in Porto everything happened in the urban center, in the historic districts, with people who had lived there for a long time. There, the idea of a city in which the poor have a right to the historic center, where old and new coexist, was experimented with. 
The film follows this process, the movement of the streets and the dynamics of collaborative architecture. In SAAL, the architects organized themselves into technical brigades, which worked by zone. The brigade worked to speed up construction. It therefore began by designing and building on land that was already available, without having to resort to expropriation processes, which were always slow. The process gained enormous autonomy and progressed quickly.