In São Paulo, in the late 1960s, the convent of the Dominican friars became a trench of resistance to the military dictatorship that governs Brazil. Moved by Christian ideals, frets Betto, Oswaldo, Fernando, Ivo and Tito came to support the guerrilla group Ação Libertadora Nacional, commanded by Carlos Marighella.
Three young Brazilian try to help a terminally ill woman who lives in the slums of Rio de Janeiro. Their youthful idealism is shattered with the cruel reality of police brutality.
Ângelo arrives at his grandmother's house in Minas Gerais. There, a small chest full of coins and an enigma were discovered, supposedly left by a priest who, 200 years earlier, would have hidden a handful of diamonds.
