It's Halloween, and Bert Hannah is eagerly looking forward to the annual trunk-or-treat being held at her church. She's got a great costume picked out and has plans to hand out mini Jack-O-Lantern Pies. The celebration takes a tragic turn when an accident occurs in the middle of the festivities and a member of the congregation ends up dead. Bert is the only person who actually witnessed what happened, and the more she thinks about it, the more she wonders if it was merely an accident after all. It seems as though murder has struck again, and Bert is determined to pin down the killer before they can deliver one more Halloween trick.