A young girl, Benilde, so protected by her religious family that she seemingly knows nothing about procreation, insists that her mysterious pregnancy is a miracle; however, her distressed bourgeois family decides that Benilde has lost her mind.

Maria Amélia Matta
as Benilde

Jorge Rolla
as Eduardo, Benilde's cousin

Varela Silva
as Melo Cantos, Benilde's father

Glória de Matos
as Etelvina, Eduardo's mother

Maria Barroso
as Genoveva, the house-keeper

Augusto de Figueiredo
as Cristóvão, the priest

Jacinto Ramos
as Fabrício, the doctor