The Last House On The Left (2009)

Based on Wes Craven's landmark 1972 exploitation flick of the same name, LAST HOUSE ON THE LEFT is a brutal movie that exposes the darkest recesses of human depravity. The simple plot follows four criminals on the lam who encounter a pair of nubile female teens in a small mountain town. After murdering one and brutally raping the other and leaving her for dead, the cons seek refuge at a nearby summer house. The twist is that it's the very home inhabited by the parents of one of the victims. Upon learning that their house guests raped and tortured their 17-year-old daughter, the couple exact a revenge that arguably exceeds the excesses of the sociopathic gang.