While these three stories intertwine throughout the novel, one thread pulls them together: the nightmare vision walking the streets, a rogue musical virus that infects its users and feeds off their fears, growing stronger with each kill. Designed to take down the corporate powers of the Grid, a powerful governing entity on the banks of the River, this weapon has gone rogue, harvesting any user it comes across, threatening to collapse the entire structure of the River itself. Facing this threat, each character is altered, entangled with others looking for something real to hold onto in a world of technology and fantasy.