A child is witness to an assault on a monk by the gang of Lorenzo the Fifth. The monk escapes and takes refuge in the estate of Doña Carlota, a countess who lives with her son Juan and daughter Beatriz. Basilisa, the maid, conjures the devil to free her son from an irreversible illness, but to do so the evil must be transmitted to an innocent soul, and for that she chooses Beatriz. The child begins to be the victim of a possession, for which everyone blames the monk.
Carmen Sevilla
Doña Carlota
Nadiuska
Basilisa
Jorge Rivero
Fray Ángel
José Sacristán
Máximo Bretal
Sandra Mozarowsky
Beatriz
Elsa Zabala
Saludadora
José Lifante
Rata
Óscar Martín
Juan
Eduardo Bea
Tres Dedos
Pedro Luis Lavilla
Gondarín
Juan Antonio Peral
Pelos
José Luis Velasco
Cepillo
Sandalio Hernández
Cristamilde
Óscar Cortina
Herrero
Juan Miguel Cuesta
Voz en off (uncredited)
