Last House on the Left follows a group of teenage girls heading into the city when they hook up with a gang of drug-addled ne'er-do-wells and are brutally murdered. The killers find their way to the home of one of their victim's parents, where both father and mother exact a horrible revenge.
After kidnapping and brutally assaulting two young women, a gang unknowingly finds refuge at a vacation home belonging to the parents of one of the victims: a mother and father who devise an increasingly gruesome series of revenge tactics.