Vicky loves Ricardo but Ricardo loves Barbara. So, Vicky goes to a gypsy witch who convinces her she must make a pact with Satan in order to cast an effective love spell on Ricardo. After Vicky gives her body and soul to the Dark One, she engages with Ricardo in a passionate night of lovemaking that is cut short by Satan, who, sensing that Ricardo has not completely fallen under the spell, orders Vicky to kill him. Following Ricardo's death, his brother Carlos is haunted by nightmares of the dead sibling, who appears and takes possession of Carlos in order to get his revenge on Vicky.

Ana Luisa Peluffo
as Vicki

Gonzalo Aiza
as Ricardo Santamaria / Carlos Santamaria

David Reynoso
as Detective Méndez

Beatriz Aguirre
as Mrs. Santamaria

Roberto Cañedo
as Psychiatrist

Silvia Suárez
as Margarita

Norma Somarriba
as Bruja

Barbara Wells
as Bárbara

Bertha Shute
as Elvira

Alma Nuri
as Mujer poseída por Vicki