When an old friend from the Marine Corps is jailed for the murder of an influential wine critic, exotic wine merchant Sebastian Carroll must vie with secret societies and ruthless suspects to reveal the dark mystery behind what has happened. Set amid the world-renowned vineyards of Napa and Sonoma Valley, this first installment in the "Master of Wine" series tracks the diabolical chain of events where a single murder in the wine country draws a former military intelligence officer toward an abyss of international mystery and intrigue.