Writer Hans van Arnhim travels to a remote island in Holland to research a story about the fabled Mill of the Stone Women, a carousel of female statues created by art professor and sculptor Gregorious Wahl.

Later, Professor Wahl informs Hans that Elfie suffers from a mysterious illness, which took her mother's life as well, and that their live-in physician, Dr. Loren Bohlem, provides her with around-the-clock care should she need medical intervention.

Directed by what seems to be Gregorius' disembodied voice, he finds Elfie's lifeless body lying in a tomb at the nearby cemetery.

When Hans leaves, Gregorius and Dr. Bohlem reveal their plot: they deliberately drugged him to make him appear insane, thus giving a reason for him to be ejected from the mill and separated from the obsessive Elfie.

That night, Dr. Bohlem and Gregorius bring Annelore, a local woman whom they have kidnapped, to a makeshift procedure room hidden in the mill.

The opening credits of Mill of the Stone Women claim the film's plot is based on a short story by Pieter van Weigen in the book Flemish Tales.

[1] Roberto Curti, author of Italian Gothic Horror films, 1957–1969, described its earnings as "disappointing" in its home country, but points out that it was more successful abroad, where it was distributed by Galatea.

[3] A contemporary review in La Stampa stated that Ferroni directed the film with skill and technique, but that it resorted to cliches of coffins, corpses and screams that make scary moments less frequent than expected.