Meg Langslow's in for a busy summer. Her husband is directing a production of Macbeth, and most of the cast and crew are occupying spare bedrooms in their house. She also has to keep an eye on Camp Birnam, where a group of medieval reenactors are commemorating the real-life Macbeth by setting up what they fondly believe is an authentic medieval Scottish military camp. And then there's Damien Goodwin, a filmmaker who has been hanging around, trying to document the production. When Goodwin hosts a showing of some of the footage he's taken, he manages to embarrass or offend just about everyone. The next morning Meg isn't exactly surprised to find that someone has murdered him. But who?