This is part of the She’s So Giallo (Women of 1970s Italian Thrillers) season at the Barbican curated by Josh Saco, aka Cigarette Burns Cinema. You can find all the details here.
The remarkable Edwige Fenech stars in this London-set giallo as Jane Harrison. Jane is troubled and traumatised, living with the memory of her murdered mother and the misfortune of losing her unborn child in a car accident. When she seeks help to deal with her emotional problems, she is unwittingly captured by a satanic cult and forced to conduct murders on their behalf. And all the while, Jane is being stalked by a stiletto-wielding stranger. Maybe her misery is being caused by her jealous sister Barbara (Nieves Navarro, billed as Susan Scott) or her distracted lover Richard (George Hilton)? Or is it all in her head? This is a gloriously over-the-top and gory mystery from director Sergio Martino, full of Martino's signature psychedelic imagery and challenging questions about sex and feminism and freedom.
Here (and above) is the trailer.