The year is 1993. Christina Perretti, working as an investigator with Interpol's new art crimes unit out of Rome, discovers, through the recovery of a lost Egon Schiele painting in Moscow, a cache of notes from a notorious Berlin art dealer for the Nazis, Harry Maes. The notes are addressed to his son Nikolaus, but they concern the provenance of a number of paintings believed to have been in Maes's possession at the time of his death. As...