The House That Screamed (1969)

In a 19th-century French boarding school for troubled girls, Headmistress Señora Fourneau forbids her teenage son Luis from going near any of the girls, finding none of them good enough for him and saying he should find someone like her. Eighteen-year-old Teresa Garan arrives at the school to be enrolled, and notices odd occurrences at the boarding school from the moment of her arrival, specifically the sense of being watched or followed.

Señora Forneau, a strict disciplinarian, abuses the unruly students by means of beatings and flagellation, with the help of Irene Tupan, a senior student whom she has taken as a protégé. When one of the girls goes missing one night, Irene is blamed by Señora Forneau for not keeping close account of the keys that allow entry in and out of the school. Meanwhile, Teresa begins a romance with Luis, but grows increasingly unnerved by the atmosphere of the school and the multiple disappearances of students. She is also bullied by her peers, who torment her because of her mother's past as a prostitute.

This is an enhanced version on BD-R