Agatha, Roy, and Sarah attend the Fruit Preserve Festival, where Charles and James are two of the judges for the jam competition, and DCI Wilkes is one of the competitors. After a few rounds of tastings, however, the judges start to act out, hallucinating-and Dr. Stevens, believing she can fly, jumps from the roof. DCI Wilkes employs Agatha to find the killer, as he's currently in the frame.

The stage is all set for the wedding of the year between James and his Welsh fiancée, Eirwen, but nothing ever goes to plan in Carsely. First, an unfortunate paintballing mishap leaves the couple splattered in their finery. But ruined attire matters little when Eirwen is shot dead the night before the wedding, and Agatha must take on the case to clear James's name.