Bodies are piling up with grisly messages carved into their chests. Rival gangs are competing for control of Glasgow's underworld and it seems that Cooper, McCoy's oldest gangster friend, is tangled up in it all. Detective Harry McCoy's first day back at work couldn't have gone worse. New drugs have arrived in Glasgow, and they've brought a different kind of violence to the broken city. The law of the street is changing and now demons from McCoy's past are coming back to haunt him. But vengeance always carries a price. The waters of Glasgow corruption are creeping higher, and the city's killer continues his dark mission. Can McCoy keep his head up for long enough to solve the case?