The tiny island of Ile de Groix off the coast of Brittany is the scene of a murder left shrouded in mystery and grief. Adam Killians study has been left intact since his death twenty years ago. He left it to his son to decipher; who died before he got a chance. Now the only hope left is Enzo Macleod. He believes that his modern forensic skills might find something in the cryptic study that everyone else has missed. And his investigation will lead him to a suspect once acquitted, a widow still hoping, and eventually, to a treacherous hellhole where a long-kept secret promises to be revealed.