Hop on the school bus, because Franklin's class is heading to the museum! Franklin is thrilled for his very first class trip, until Beaver whispers a scary secret. She tells him that there are real, giant dinosaurs waiting for them inside the building. Suddenly, Franklin is filled with worry. He tries to enjoy all the fascinating exhibits, but he cannot stop thinking about the scary monsters that might be lurking around the corner. When he finally comes face-to-face with a towering Tyrannosaurus Rex, he discovers a wonderful surprise. Tag along with Franklin as he turns a frightening rumor into a fascinating discovery and learns that museums are filled with amazing history, not monsters!