Commissaire Adamsberg is a man with a profound belief in his own hunches. Whilst a lot of his squad are preparing for a DNA technology study trip to Quebec, Adamsberg is really distracted. Firstly, he's distracted because his right hand man, Danglard is quite convinced that they are all going to die in a fiery plane crash and Adamsberg is wearing the brunt of keeping him calm and getting him on the plane. But there's something else that's not right and finally it dawns on Adamsberg that a newspaper report of the murder of a young woman in another district of France has triggered recognition in him. Recognition of nine other murders, all occurring between 1943 and 2003, all in different parts of France. Adamsberg is the only person who is absolutely sure that he knows who is doing these murders, despite the suspect's own funeral, years before.
Leading up to their trip away, Adamsberg runs his theories past a number of colleagues and the police in charge of the latest case and, as he feared, nobody places much credence in the idea that a man, dead for years, could be a prime suspect in the last murder. Adamsberg is obsessed with this case, not the least because he knows the man he suspects, Judge Fulgence, only too well, with a very close family and childhood connection to him.
When he trip to Quebec commences, the plane doesn't crash, and the team arrive and commence their training. Adamsberg returns to his lifelong habit of walking miles in an effort to exercise, think and clear his head, and in the process of which me meets a strange, young French woman with whom, despite his own better judgement, he forms a quick sexual liaison. When she threats to join him on the trip home, he is relieved when she doesn't show up to the plane. When he is lured back to Quebec after a few days, he finds that she has been stabbed to death and he is the prime suspect.
Adamsberg needs to get out of Canada and back to France, where he must conceal himself and solve not only the death of the young woman in Canada, but prove once and for all that a dead Judge is a killer.
There are some really interesting elements to WASH THIS BLOOD CLEAN FROM MY HAND. Guilt - Adamsberg is not sure that he has not killed the young woman - he had blanked out for the period of time and he doesn't know why. Concealment - in order to be safe in France and solve the case of the Judge and the 10 past murders, he must remain free so he goes into a sort of hiding. Betrayal - there is obviously somebody in Adamsberg own team feeding information to the Canadian police about events in France as well. Friendship - Adamsberg takes refuge with an old friend who, along with her resident lodger and 80 year old computer hacker, they provide support and belief in Adamsberg. Loyalty - members of the French Police believe in Adamsberg and go out on a limb to help him. Madness - how could a deadman go on killing, and why would that man have started on a career of murder that has gone on for so long with so much effort to cover his tracks.
And then there is the madness of Adamsberg himself. He's always been a quirky character, prone to hunches, flashes of understanding (or guesswork - depending upon your perspective). He walks miles, he talks to himself, he believes totally in the idea that dead men can walk and he is tortured by events from his childhood. He's tricky, he's not straightforward and Vargas can write a story that weaves a web around the reader and draws you into the joy of the book.