The Go Jetters head to the ancient Peruvian city of Machu Picchu to watch Kyan compete in the Inca Trail Marathon. In the skies above, Grandmaster Glitch tries to fix his Grimbot when a loose spring causes it to bounce about inside Grim HQ like a children's toy. It accidentally gets a blast from Glitch's size ray and grows to gigantic proportions. Another Grimbot pulls a lever and the monster robot slips through the front hatch, tumbling towards the ruins below. As Kyan nears the end of his race, the giant grimbot crashes down. It scoops him up and they bounce down the ancient steps. Machu Picchu is in danger and the Go Jetters must work with Glitch if they are to save the day.