A father, a mother and their three kids live in a house in the outskirts of a city. There is a tall fence surrounding the house. The kids have never left the house. They are being educated, entertained, bored and exercised in the manner that their parents deem appropriate, without any influence from the outside world. They believe that the airplanes flying through the sky are toys and that zombies are small yellow flowers. The only person allowed to enter the house is Christina. One day Christina gives one of the daughters a headband as a present but asks for something in return.