The Great Quake of 1906 left San Francisco in ruins. The destruction not only paralyzed the city, it also devastated California’s burgeoning wine industry as more than two dozen of downtown San Francisco’s wine warehouses burned to the ground. Vowing to rebuild, the California Wine Association settled on Contra Costa County’s western shore as the new home for Winehaven ― the largest winery in the world.

Presently, newlyweds Harrison and Celeste also find themselves drawn into exploring the county's historic wine industry through a mysterious bottle, a cryptic note, and an ancient Chinese bone box. As the two teachers investigate one family’s mystery and its possible connection to a hidden fortune, it soon becomes clear that there are dark secrets hidden beneath the tangled vines of the past.

From unsung Chinese immigrants to renown vineyard owners John Muir and John Swett, join Harrison and Celeste's perilous quest in the one place where past meets romance...

... in the Shadow of Diablo.