Every cop has a personal 'white': a criminal who got away with murder - or worse - and was able to slip back into life, leaving the victim's family still seeking justice, the cop plagued by guilt. Back in the 1990s, Billy Graves was one of the Wild Geese: a tight-knit crew of young mavericks, fresh to police work and hungry for justice, looking out for each other and their 'family' of neighbourhood locals. But then Billy made some bad headlines by accidentally shooting a ten-year-old boy while bringing down an angel-dusted berserker in the street. Branded a loose cannon, he spent years in one dead-end posting after another. Now he has settled into his role as sergeant in the Night Watch, content simply to do his job and go home to his family. But when he is called to the 4AM stabbing of a man in Penn Station, Billy discovers the victim is the 'white' of one of his oldest friends, a former member of the Wild Geese.