James loves two things more than anything in the world: dinosaurs and miniatures. So when his class goes on an excursion to a museum and James finds a miniature dinosaur in the gift shop, he can't help himself: he steals the dinosaur. But as the day continues, James's guilt grows. And so does the dinosaur! The only thing that can cure James's guilt - and shrink the dinosaur back to its proper size - is doing the right thing.