Alucarda (Spanish: Alucarda, la hija de las tinieblas, or Alucarda, the daughter of darkness) is a 1977 English-language Mexican supernatural horror film directed by Juan López Moctezuma, and starring Tina Romero, Claudio Brook, Susana Kamini, and David Silva. A loose adaptation of Carmilla (1872), it revolves around two teenage orphan girls living in a Catholic convent, who unleash a demonic force and become possessed.

Plot

In 1850, Lucy Westenra gives birth to a daughter, Alucarda, in a derelict colonial palace in the woods. Immediately after the child is born, Lucy begs a hunchbacked gypsy to bring Alucarda to a nearby stone-walled convent inhabited by an order of Catholic nuns, as she fears the devil will claim her daughter. As the gypsy flees with the infant, a demonic voice emanates throughout the palace as Lucy dies of complications from childbirth.