The movie is centered around "dogging" which is defined as "engaging in sexual acts in a semi-public place (typically a secluded car park in a car) and then watching others doing so." (http://www.google.com/url?q=http://en.wikipedia.org/wiki/Dogging_(sexual_slang)&sa=X&ei=nMgcTb2FC4rZnAfilPDPDg&ved=0CA4QpAMoAQ&usg=AFQjCNGI9cwdBZV9RM7QN6bwarfM2RNMRg)

The film opens with a night vision scene of a couple having sex in the passenger seat of a car while the camera man asks permission to film them. This is the first of several scenes which include night vision and a people having sex in vehicles.