Luisa Kuliok
as Gina Falcone/Sor Piedad/Baronesa Manfredi
Gina Falcone and Marcelo Ricciardi are in love; however, fate—and her brother, who disapproves of the union—ultimately tear them apart. Unaware that Gina is carrying his child, Marcelo enters into a marriage arranged by his father to a woman named Elsa. While in hiding at a convent, Gina gives birth to a daughter and names her Fiamma. However, the Mother Superior suggests she hand the child over to the father, and Gina, in the throes of a feverish delirium, agrees. Marcelo marries, and after recovering from pneumonia, Gina retreats to another convent, where she takes her vows and assumes the name Sister Piedad. Years later, Gina learns the whereabouts of her daughter and of Marcelo—now a widower with another daughter named Virginia. She then becomes "The Strange Lady" (*La Extraña Dama*), a mysterious woman who, at the end of each day, sheds her habit to visit her daughter and the man she has never stopped loving.
Luisa Kuliok
as Gina Falcone/Sor Piedad/Baronesa Manfredi
Jorge Martínez
as Marcelo Ricciardi
María Rosa Gallo
as Sor Paulina
Ana María Campoy
as Valeria Uboldi
Gustavo Garzón
as Carlos Uboldi
Raúl Rizzo
as Pedro Guillon
Andrea Barbieri
as Fiamma Ricciardi Parresi (Falcone) de Guillon
Hilda Bernard
as Sor Sacramento
Gabriel Corrado
as Aldo Guillon
Tincho Zabala
as Tomas Parresi
Aldo Barbero
as Dominico Falcone
Marta Albertini
as Elsa Parresi de Ricciardi
Néstor Hugo Rivas
as Roberto Parresi
Perla Santalla
as Sor Caridad
Raúl Aubel
as Monseñor Tredini
Mabel Pessen
as Sor Catalina
Viviana Sáez
as Loreta
Alejandra Darín
as Susana Nicoli