Daniel Auteil gives a commanding performance as a French private investigator working in London following self imposed exile from Paris following the murder of his family. Making ends meet through a combination of blackmail of those involved in extra marital affairs and fees from their partners, Auteil is a weary character with little joy or passion in life, with the exception of football, and his friendship with a fellow French exile, Nathalie a high class prostitute. However when he takes on a case looking for the missing son of a wealthy industrialist, he finds himself embroiled in the sordid world of the child sex trade. A gripping story with good performances all round, especially from Auteil, this film tackles a taboo subject in a sensitive yet realistic fashion. Auteil's unorthodox methods to secure information should fill an audience with revulsion, yet in this situation, they seem entirely appropriate. Excellent if at times uncomfortable viewing.