The show focuses on Blaze, an orange monster truck, and his young but smart driver, AJ. They live in a world that involves many living monster trucks, including their truck friends Starla, Stripes, Zeg, and Darington. Another friend of theirs is a girl named Gabby, who is a mechanic who can fix anything. Each episode also features Crusher, a sneaky blue truck who cheats in races. Crusher is almost always accompanied by a green car named Pickle.

Animals in this monster machine world also have blended windows and wheels; however AJ and Gabby are not vehicles at all. In some episodes, Blaze, AJ and their friends are in a race against Crusher. During the race, Crusher cheats, usually with the help of his gray robots. However, Blaze and AJ manage to get through his traps, and they always beat him at the last second with the help of his blazing speed.

Some episodes do not involve races, but still have Blaze competing against Crusher, sometimes by racing against him to get an item. Sometimes it will involve helping a truck friend such as Starla, Zeg, Darington, Stripes, or even Crusher.