Angelitos negros (English: "Little Black Angels") is a 1948 Mexican drama film directed and co-written by Joselito Rodriguez and starring Pedro Infante.
Jose Carlos Ruiz (Pedro Infante) is a famous singer that meets Ana Luisa de la Fuente (Emilia Guiú),[1] an assistant manager of a girls school.
Father Francisco (Nicolás Rodríguez) revealed to him that Ana Luisa's real mother is the nanny Merce who in her youth had an affair with her boss, Mr. de la Fuente.
Nana Merce falls ill and Jose Carlos tries to bring Isabel (Chela Castro), a fellow artist to take care of Belen because her mother does not give her any attention.
Then tragedy occurs because Ana Luisa comes to believe that her husband wants to stick his lover in their home and she reacts violently throwing nanny Merce down the stairs by accident.