Ed Blum

Sex and love. Some seek it, some need it, some spurn it and some pay for it, but we're all involved in it. Set on one afternoon on Hampstead Heath in north-west London, the film investigates the minutiae of seven couples. What makes us tick?

This documentary is also part reality show. A dozen volunteers are set a mission to fulfil, but one by one they are captured by interrogators. They are held for a weekend, blindfolded and shackled and subjected to the same interrogation techniques talked about in the documentary. One by one they crack and tell their captors everything they know. They are made to talk!

A man and a woman both frantically try to catch the last post, but could be connected beyond the outer envelopes.