Ethan Hawke and Lena Headly live in a huge house, the biggest on the block, and are secretly resented by their neighbors. They have a somewhat rebellious teenage daughter and a very smart son. Hawke has made a bunch of money selling security systems to everyone, including his neighbors. His family has issues and when they go on lock down for the purge, they really come out. His son feels sorry for a homeless man and disarms security and lets him in. A jealous boyfriend and a strange in the house isn't enough so the freaks come out at night. Literally.
The movie is a little predictable at times. It doesn't make it less intense. The people outside of the house are truly frightening at times and there is a twist that you may or may not see coming. We all have had the fear of someone either in or trying to get in to your home. Creepy. Most of the actors are relatively unknown and that makes it better.
When watching you can't help but wonder if this version of America could happen. Rich are getting richer and poor are getting desperate. There is a lot of political innuendo throughout the film. There are are questions left unanswered, but overall The Purge is an intense thrill ride that is creepy yet entertaining. Check it out, but sleep with a light on.