Buenos Aires has oscillated between dictatorship and democracy for over a century. Its citizens have barely known political or economic stability. A powerful tradition of art and activism has turned the streets into a riot of colour and communication. Painted propaganda vies for attention with billboards. Sprayed messages declare love for football teams, people and political ideals. Graffiti writers have brought vibrant works to every corner of the city. These works show that the walls of Buenos Aires can talk. This film reveals how much they can tell us.