Escola Penal de Meninas Violentadas (1977)

Young prostitutes are taken to a penal school run by a group of nuns so that they can recover. However, the current mother superior is actually a mad assassin who killed the real one and took her place, changing the entire treatment and discipline regime of the boarding school.

Unfortunately the movie Escola Penal de Meninas Violentadas is not yet available on HBO Max.