Meet Jimmy Costello. Quiet, respectable, God-fearing family man? Or thuggish street-fighter with a past full of dark secrets? Perhaps the answer is somewhere in between ...

After Jimmy's wife dies the conflict inside him is too much and the violent assault he commits on a gangster forces him to leave London and his job with the police and disappear for a while. Now he's back, on what you might call a divine mission ... and to settle a few old scores too.

Through the eyes of his hard-boiled ex-cop, James Green takes us on a thrilling journey from 1960s Kilburn, through war-torn 1970s Africa to the modern streets of a London that seems to have cleaned up its act ... until you scratch the surface.