One summer's afternoon on London's Hampstead Heath, we delve into the finer points of love, attraction and relationships. Widowed Iris meets Eddie on a park bench. Jamie tries to hide his wandering eye from girlfriend Molly. Pete and Sara are divorcing. Julia puts a brave face on a blind date. Brian and Billy talk fidelity and kids. And Noel just wants to get laid. It's an erotically charged look at what makes us tick - and it seems that what makes us tick is complex, dark and very funny.