Amelia Hartliss is employed by British Security Services to defend the nation against attacks. She is used to that, but in the normal run of things, the assaults are coming from abroad, from extremists not born and raised in this country. It is therefore a nasty surprise to find terrorists on her own doorstep, right in her home town. It's a new challenge, and a bigger fight than anything she's ever seen. If only she had help - but her time and attention...