1972. During the government of Salvador Allende 34 artists made works that were included in the construction of the UNCTAD III building, today GAM. After the 1973 coup, few works survived looting and destruction. 40 years later, Joaquín Maruenda, son of the late sculptor Félix Maruenda, finds a record that leads him to investigate the events of the sculpture "Chimeneas" and its possible restoration. Joaquín, artists and workers involved with the construction of the building, will try to answer the question Why did they destroy the art?