In Belfast, private investigator Dan Starkey is hired by long-retired political activist Eileen Doherty to find her missing son, an internet porn baron widely known as Billy the Bear. But when Eileen is murdered Dan finds himself on the road to an unfamiliar city where danger lurks around every corner. As a blizzard sweeps in he is confronted by sex, drugs, rock'n'roll and a new generation of terrorist intent on creating mayhem their predecessors could only dream of.