Acid Row. The name the beleaguered inhabitants give to their 'sink' estate.

A no-man's land of single mothers and fatherless children - where angry, alienated youth controls the streets. Into this battleground comes Sophie Morrison, a young doctor visiting a patient in Acid Row. Little does she know that she is entering the home of a known paedophile . . . and with reports circulating that a tormented child called Amy has disappeared, the vigilantes are out in force. Soon Sophie is trapped at the centre of a terrifying siege, with a man she has come to despise. Whipped to a frenzy by unsubstantiated rumour, the mob unleashes its hatred.

Against authority . . . the law . . . and the 'pervert'. 'Protecting Amy' becomes the catch-all defence for the terrible events that follow. And if murder is part of it, then so be it.

But is Amy really missing?