When Claudia, a young American, turns up dead in the courtyard of an ancient castle in Bruno's jurisdiction, her death is assumed to be an accident related to opioid use. But her doctor persuades Bruno that things may not be so simple. Thus begins an investigation that leads Bruno to Monsieur de Bourdeille, the scholar with whom the girl had been studying, and then through that man's past. He is a renowned art historian who became extraordinarily...