England 1959. In a small East Anglian town, Florence Green decides, against polite but ruthless local opposition, to open a bookshop.

Ken Boyd, a lonely man fresh out of the loony bin, who sets out to kill those he deems responsible for his miserable life.

The eponymous Celtic warrior who rules the Iceni people alongside her husband, Prasutagus. The King dies at the hands of Roman soldiers, leaving Boudica's kingdom without a male heir, and the Romans seize her land and property.