France's Perigord region is the home of the exquisite black truffle, and at 5,000 euros a kilo, it's a treasured local asset. When reports come in that this unique delicacy is being adulterated with a cheaper Chinese version, chief of police Bruno Courrèges is asked to investigate the scam. In St. Denis market, a Vietnamese family runs a popular stall selling their country's dishes, until one morning their stall is overturned and wrecked by attackers who look Chinese. Bruno wonders if these are the opening shots of a Viet-Chinese triad war. When a horrific murder is added to the mix, Bruno has his work cut out to find the connection between present crimes and long-buried ones that are linked to France's colonial past. In this gripping new investigation, Bruno needs all his local knowledge, acumen, courage and charm to work his way towards the truth.