The film is set in and around a bird-hide on the Suffolk marshes owned by Roy Tunt (MacQueen). Roy is a middle-aged, obsessive bird watcher, who needs just one more sighting (of the sociable plover) to complete the entire British list of birds. He is unexpectedly joined by a dishevelled and tattooed stranger, who introduces himself as Dave John (Campbell). After an awkward start, the pair build up a rapport, share lunch, have a drink and discuss a wide variety of subjects. Roy tells David that he used to work in a poultry factory and that his wife left him for another man.