I Spit on Your Grave (1978)
Also known as Day of the Woman, this is the story of a woman who retreats out of New York to write her first novel, and is captured by a group of local men, in order for one of them to lose their virginity. The four men gang-rape her, destroy her novel and leave one to murder her - but he cannot go through with it. After her recovery, she then plots to take her revenge each of them, violently murdering each them all.
The controversy is linked to the lengthy and graphic gang-rape scene which has been described as glorifying violence against women. The writer and director, Meir Zarchi, responded to such criticisms by explaining how he was inspired to make the film after he helped a young woman after finding her bloodied and naked in New York after she had been raped - denying that the film was too exploitative.