The Killer Nun

Legendary Swedish sex bomb Anita Ekberg stars as Sister Gertrude, a cruel nun who discovers depraved pleasure in a frenzy of drug addiction, sexual degradation and sadistic murder.
A demented nun sliding through morphine addiction into madness, while presiding over a regime of lesbianism, torture and death. Sister Gertrude is the head nurse/nun in a general hospital, whose increasingly psychotic behavior endangers the staff and patients around her.