MI5 intelligence officer Liz Carlyle has just been despatched to Northern Ireland. It's a promotion, and she'll be running agents - her favourite activity - but it also means being separated from Charles Wetherby, her old boss, recently widowed and a very close friend. Attachments in the Intelligence Services are not encouraged: it seems her superiors know more about Liz's life than she thinks. In Belfast, Liz and her team are monitoring the brutal breakaway Republican groups who never accepted the peace process and want to continue their 'war'. Intelligence is focused on the shady Fraternity, with links to drug-running, arms-dealing and organised crime. With some help from Special Branch and a volunteer informant who seems to be legit, the Fraternity's leader is identified as a cold, calculating and ruthless American, hijacking the Cause for his own financial ends. It is a perilous group to become involved with. Especially if your informant turns tail...