While looking in the mirror one day Harry and his dino friends try to imagine what it would be like to step through it. They go to Dino World to see if they can settle their curiosity and get to explore the mysterious place on the other side of the looking glass. At first glance they are surprised that everything looks the same, when it suddenly dawns on them that everything is in the wrong place. Dino-mirror world is a back to front world! Harry and the dinosaurs have fun speaking backwards and meeting many amusingly odd characters along their back to front travels.