When a shocking act of sabotage results in the death of a Mexican migrant worker at a winery vineyard, New York photojournalist Margaret Barlow finds herself matching wits with a cunning murderer.

At a hot-air ballooning rally in northern California, free-lance journalist and amateur sleuth Margaret Barlow accepts a request from Elissa Seldridge to investigate a series of accidents at L'Abbaye Ste. Denise.