For no apparent reason, ordinary people are killing total strangers. Although there are no direct links between the murders, they all show the same ritual patterns. Lucas Kane becomes one of these murderers, and haunted by strange visions he must try to keep one step ahead of the police to discover what is happening to him.

Inspector Carla Valenti and Agent Tyler Miles are heading up the investigation. A series of disturbing clues takes them into a world they can only dream of. Meanwhile the early onset of winter paralyses Manhattan in an unbearable grip of snow and cold. Each day the temperature drops as the winter conditions draw over the dark streets of New York.