Maria is a young orphan who lives with her wealthy aunt. Maria sings in a cocktail bar with his friends, who form a rock band, and enjoy the night with them. One of his friends, Ernesto, is in love with her, though she does not seem to feel the same about him. In fact, multiple existential doubts and feel a strange emptiness in his life suddenly drive to enter a convent as a novice, breaking Ernestos' heart. However, with her cheerlul character, open and rebellious, not appear to conform to life in the cloister, and especially have problems with the novices director , who often punished for trying to take the right path. In the convent, which also functions as children's hospital, she meets a doctor with which it takes quite right for the contrast between his two characters, but his way with love and mutual respect.
Hilda Aguirre
as Sor María "Sor Ye-yé"
Manuel Gil
as Juan, el doctor
Enrique Guzmán
as Ernesto Nieva
Sara García
as Madre María de los Ángeles
Carmen Montejo
as Madre superiora
Lina Canalejas
as Susy
José Gálvez
as Pepe Castaño
Ofelia Guilmáin
as Sor Emilia
Adriana Roel
as Sor Inocente
Margot Cottens
as Tía de María
Norma Mora
as Novicia
Enrique García Álvarez
as Señor Obispo
