Clarence may look like a normal truck, but he is always ready to rev his engine and transform into the superhero Mighty Truck whenever trouble strikes. Today is the biggest, dirtiest, most exciting event in all of Axleburg, and everyone is covered in mud. But when sudden danger threatens the muddy celebration, Clarence finds himself in a sticky situation. He knows he has the power to zoom in and save the day, but doing so right in front of the huge crowd means his best pal Bruno might discover his secret identity. Can Clarence figure out a way to rescue his friends without blowing his cover? Gear up for a high speed, all wheel drive adventure where bravery and loyalty are put to the ultimate test. Discover why true friendship is always thicker than the deepest mud puddle in town.