Emma, 20, lives with her elderly grandmother, Mad (short for Madam), a famous retired actress, in the small village of Poldrea in
Cornwall. They share a large house near the coast with Mad's six ‘maladjusted’ adopted sons who range in age from 3 to 18. One morning, Emma wakes to the sound of aeroplanes overhead. An American warship has anchored in the bay and
United States Marines are marching over the fields. They are trigger-happy, and one of them shoots and kills a local farmer's dog. After some hours of civil confusion, a television announcement is made by the
prime minister: due to recent economic and military failures on the
continent, the UK and the USA have joined together as a single nation, to be called USUK. The new government of USUK declares a
state of emergency, institutes roadblocks, and cuts local telephone and postal communication. To Mad and her family the US Marines appear less like invited friends than a hostile invading force. Andy, 12, one of Mad's adopted boys who has an obsession with bows and arrows and a hazy understanding of the concepts of right and wrong, shoots and kills one of the Marines. Mad, Emma and some of the locals cover up the death, and throw the body over the cliff into the sea. It is not found for several days, and in the absence of a culprit the military authorities crack down on the local population by cutting food, electricity and water supplies, and arresting and taking into custody all the local men and youths. Mad encourages the local farmers to an act of civil disobedience in which huge piles of rotting manure are dumped in front of the local
pub where the American military authorities have arranged their
thanksgiving celebrations. Shortly afterwards, there is a huge explosion which sinks the warship in the bay. Nobody knows the cause, but in a televised speech the prime minister hints of sabotage "by unknown agents hostile to USUK”. Mad and her family retreat to their cellar, where they subsist for several days on apples and beetroot, and water from a re-opened well. Early one morning, Emma and the boys are woken by aircraft and what appears to be gunfire, explosions and depth charges, while Mad sleeps on. Power has been restored, and a television announcer states that the sinking of the warship may have been caused by torpedo action. In any event, the security regulations have been relaxed, and the Marines are to leave the local area. A stream of helicopters flies overhead, leaving Cornwall. The local doctor arrives in his
Land Rover. Emma notices Mad standing in welcome at her porch, but when she realises that nobody else can see her she tells the doctor that he had better go down into the basement, where Mad has been asleep for a very long time. The novel concludes with the helicopters still flying eastward into the sun. ==Dedication==