A reconstruction of the possible events that might have led up to the real-life tragic case of the Luxton family who lived at West Chapple Farm, Winkleigh, Devon. Brothers and sister Robert, Alan and Frances Luxton had lived in the farm for many years. On 23 September 1975 their bodies were found with shotgun wounds outside their farmhouse.

Terry and June Medford are both middle aged and beginning to find the trials of life are more difficult as they try to succeed in their daily lives. The couple have just moved to Purley, south-east London... Aunt Lucy and the mynah bird had disappeared, as had the occasionally visiting daughters. Terry and June now mixed with a friendly next door neighbour, Beattie; Terry's chatty work colleague, Malcolm; and their gruff boss Sir Dennis Hodge. Otherwise, things were much as before, with Terry's pigheaded childishness causing no end of problems, usually thwarting June's attempts at leading a cosy life.

A strange new virus has appeared, which only attacks strains of grasses such as wheat and rice, and the world is descending into famine and chaos. Architect John, along with his family and friends, is making his way from London to his brother's farm in northern England where there will hopefully be food and safety for all of them.