The Last House On The Left (1972)

Mari and Phyllis go to the dangerous neighborhood to see their favorite band BloodLust on Mari';;s seventeenth birthday. Unfortunately, the two young girls are raped and butchered by newly escaped convict Krug and his gang. The gang seek shelter in Mari';;s home, but during the night, her mother overhears a conversation of the criminals telling that they have killed her daughter. She tells her husband and they plot a scheme to revenge the death of their princess.