Spark, a mechanic who dreams of becoming a Racer, finds a worn-out old engine and activates it.
Flash sends Spark on what seems like a simple task, but turns out to be anything but.
Hairpin dreams of being a Racer but lacks confidence; she helps Bolt who gives her his engine.
The mysterious high-altitude performer Shango issues a challenge to the newly arrived Racers.
Spark messes up Hairpin's workroom. He takes Bellows with him to find a rare ore as compensation.
Spark's engine is damaged, and Shango has stolen the design chip for the repair.