Vacation Massacre / Vacanze per un massacro (1980)

The film starts off outside a small farm near Rome, and the first thing we see is a mysterious man kill the farmer and steal his car. We then see the man drive up into the mountains but we are still not sure why. We then cut to the other three main characters of the film: Paula and Sergio are married and own the small house in the mountains where they only travel to at weekends and Lillian is Paula's sister, who just happens to be having an affair with Sergio. Cut forward a few scenes and we have Sergio going hunting, Paula going shopping and Lillian staying home to sunbathe. Lillian puts on the radio and we hear a news report a thief and murderer who has escaped from jail and is on the loose. We then realize that the man who stole the car and is hiding near the house, has buried 300million lira in the house (from the previous robbery). The robber (whose name we now know as Joe Brezy) takes the three of them hostage whilst he digs for his loot. When he finally gets his loot, he plays Paula, Lillian and Sergio against each other, telling Paula about the affair her husband and sister are having. This makes way for a powerful twist at the end of the film that is not to be missed.