8 year old Nancy Drew decides to build a model of a volcano for her science project. Best friends George (Georgia) Fayne & a gungho Bess Marvin arrive to help. But the next day their teacher Mrs. Ramirez opens the door to find all the volcanoes missing. Why are they missing? Is it an actual crime or a prank? & who did it? Nancy Drew with the help of Bess & George is on the case!