The film is a historical evidence of what happened by the end of 60s in Vajont Valley with the construction of a large dam. The sequences of the plot are well given as well as problems and the ethics of constructors in the discussions and dialogues. Good photography and good acting from outstanding actors, such as Daniel Auteuil, Michel Serrault and Jorge Perugorría, who is probably the second Cuban actor in Italian films (the first was Tomas Milian). Perugorría gave the special touch to the film with his acting as a person who lost his wife and son during the mortal avalanche. Guilty engineers and geologists showed their cowardice at the crucial moment. They were just condemned to five years prison, and some were set free before that period.