The world has changed. War rages in South America and China, and Britain - now entirely dependent on the US for food and energy - is run by an omnipresent dictatorship known simply as The Authority. Assets and weapons have been seized, and women are compulsorily fitted with contraceptive devices. This is Sisters story of her attempt to escape the repressive regime - from the confines of her Lancaster prison cell she tells of her search for The Carhullan Army, a quasi-mythical commune of unofficial women rumoured to be living in a remote part of Cumbria.