A biography of the Belgian nun Jeannine Deckers, who became a popular singer in the early 1960s and struggled with the contradiction between the church and her true self.

Cécile de France
as Jeannine Deckers / Sœur Sourire

Sandrine Blancke
as Annie

Jan Decleir
as Lucien Deckers

Johan Leysen
as Père Jean

Chris Lomme
as Mère Supérieure

Marie Kremer
as Françoise

Jo Deseure
as Gabrielle Decker

Filip Peeters
as Antoine Brusson

Christelle Cornil
as Soeur Christine

Fabienne Loriaux
as La maîtresse des novices