Sydney Whitmore is already up to her ears in wedding plans, wine tastings, and wendigos when her best friend, Kelly Green, scores them invites to an exclusive Halloween bash at a long-abandoned monastery. Perched above a vineyard and steeped in ghost stories since Syd and Kelly were children, the crumbling estate is the perfect backdrop for a night of high-dollar scares. But when “Dracula” turns up dead and the suspects include a mummy, a ghost, and a wolfman—none of whom ever removed their masks—Officer Sam Stone enlists Syd and Kelly to help unmask a killer hiding behind a monster’s face.