Middle schoolers Cal and Laroosh Schmidlap have started their own detective agency. Cal always wishes to utilize his computer, math, and science skills; whereas, Laroosh reverts to her fantasy world and the teachings of Sherlock Holmes to solve the mysteries. Despite having to include their younger sister Moorea (or maybe due to her presence) they have solved some trivial cases, including the recovery of missing items. Now they are confident that they are ready for the big time and can find the person or persons responsible for a rash of thefts at the local elementary school. Despite warnings from their Dad and distractions by the Middle School bullies, the Needlenose Nine, Cal and Laroosh convince themselves that the Schmidlap Detective Agency can and will solve this crime; that is before they are captured and threatened with their lives. What will they do now?