Detective Inspector Alex Ridley, who is lured back into service as a consultant detective when his former protégée, Carol Farman, needs help cracking a complex murder case.

故事发生是北爱独立战争期间。英国士兵乔迪（福里斯特·惠特克 Forest Whitaker 饰）在阿尔马遭到了北爱共和军的绑架，共和军企图用他来交换被英军扣押的俘虏。看守乔迪的是弗格斯（斯蒂芬·瑞 Stephen Rea 饰），他的内心对杀戮和战争…