The Blood Promise (Hugo Marston Series #3)

Hugo Marston must figure out what lies hidden inside an old sailor's chest before a 200-year-old blood promise is revealed and claims another life. In post-Revolution Paris, an old man signs a letter in blood, then hides it in a secret compartment in a sailor's chest. A messenger arrives to transport the chest and its hidden contents, but then the plague strikes and an untimely death changes history. Two hundred years later, Hugo Marston is safeguarding an unpredictable but popular senator ...