1985: a killer stalks the streets of that most divided of cities, Belfast.
Detective Inspector Cross's quarry might simply be someone who has made sectarian violence his vocation, except this killer cuts across political and religious boundaries. The investigation draws in a young policewoman, and to unmask the killer she and Cross must enter a maze of conspiracy, paranoia and tainting secrecy.
At its centre lurks a violence beyond their worst imaginings - a nightmare world without exit, where political and sexual terror form a part of the same deadly trap. Then, as they uncover the motives and layered identity of the killer, the evil closes in . . .