It's Blackberry Valley Festival time, and the whole town is gearing up for the chefs' cook-off and other exciting events. But right before the big weekend, Hannah Prentiss is disturbed to hear about prowlers roaming the grounds and items going missing from her friend Elaine Wilby's hundred-year-old-farm. The incidents seem to coincide with an article in the local paper about another festival, held ninety years ago, when the newly crowned Onion Queen disappeared without a trace.

Elaine believes someone might be after her family's special heirloom onion seeds. The uniquely flavored onion was grown on the farm decades ago but has long since disappeared.

Could the perpetrator have a connection to the long-lost seeds… and to the missing Onion Queen?