Glasgow in the future, searing heat and monsoons, scrubbers in the sky, skyscraper living units that have become slums, and a police force that needs Thrummers, Whompers and Zappers to go about their business. The halfheads are convicted criminals who have been facially disfigured, lobotomized and set to menial duties. However, one isn't quite like the others and wants revenge. Macbride's black humour and Glasgow repartee are still present, as are the gruesome details of brutal murders, disfigurement and gory firefights. Towards the end, it feels like participating in a computer game of Quake or Duke Nukem.
Not his best work, though if you like the blood and guts aspect of Macbride this will suit you, the more delicate natured will probably find it disagreeable.