Ricardo Trêpa, Leonor Baldaque, Manoel de Oliveira, Isabel Ruth, Júlia Buisel, Leonor Silveira, Agustina Bessa-Luís, Jacques Parsi, António Costa

O Princípio da Incerteza is a movie starring Leonor Baldaque, Leonor Silveira, and Isabel Ruth. Having lost her place among the social elite, a widow remarries and starts a family.