The story of one herd in 1975. After a cold wet spring and the long drought of summer, a staple food is running short. Milk - and that means butter and cheese - is losing its attraction for farmers. Over 600 farms abandoned milk production in July alone. If that trend were to continue, there would be no milk at all in 1984. The national herd is being slaughtered at the rate of one hundred thousand a year. No British butter has been made since July and supplies of milk at Christmas are already threatened. Against this worrying background is the star of this film, Celia, a patient dairy cow, programmed to conceive, deliver and lactate for our benefit every nine months. Producer ROGER MILLS