Haunted by the brutal killing of his UN interpreter wife in Bosnia, ex-SAS operative Ed Coltrane is consumed with the need to hunt down her murderers. Drinking too much and spending too much on his search, his life is going into meltdown. Just as it seems he can fall no further, a former colleague informs him that one of his wife's killers is in London, as a guest of the British government. Certain unofficial figures in the corridors of power would like to see this man disappear, and they'd like Ed Coltrane to accept the contract.