The life of Galileo Galilei, from his studies on improving the telescope, his formulation of scientific method, and his role in support of Copernican heliocentrism, to subsequent accusation of heresy, trial and abjuration of his theories. Forty years after its original release, Galileo is presented in the version restored by the National School of Cinema. The film points an accusing finger at blind arrogance and intellectual authoritarianism, raising a hymn to scientific inquiry as the guiding light of progress and freedom.