When Grim HQ's heating gets stuck on, Glitch looks for a cold place to land and cool down. Meanwhile, the Go Jetters enjoy the cool sights of Harbin Ice City in China. Every year sculptors at the festival create realistic models of world-famous landmarks from blocks of ice, and Lars is attempting to carve the Eiffel Tower. Suddenly the sculptures around them begin to melt. The team investigates why everything is heating up and discovers a red hot Grim HQ sat in the middle of the festival. If they don't move it quickly, Harbin Ice City will melt!

Glitch is in New York to see a Broadway show, but can't find anywhere to leave the Grimbler. Then he stumbles on Central Park and decides to build his own car park there. Meanwhile, the Go Jetters drop Kyan off nearby, so he can practice his fantastic gymnastics in the park. Kyan discovers a queue of cars making their way across the grass, with a Grimbot traffic warden directing them towards a huge Grim car park. He tries to stop them, but the Grimbots attempt to shrink him with their size ray. As Xuli, Lars and Foz enjoy the view from the Statue of Liberty, they spot a blanket of smog covering the New York skyline. Xuli calls Kyan to find out what's going on and Kyan explains that Glitch's car park is causing the smog to build. Ubercorn sends Lars and Foz to suck up the smog, and Foz uses the size ray to shrink the car park.