When DCI Flood's wife is murdered in a hit-and-run attack by a vengeful gang, his life is torn apart. The police fail to discover the perpetrators. Two years later, the investigation is relegated to a cold case. Flood becomes obsessed, spending all his spare time hunting his wife's killers, alienating friends and family. After witnessing another shocking murder, he is plunged into the menacing world of organised crime. His investigations unearth startling similarities to the cold case, which puts his life in danger.
