As Jace is flying past Jupiter, he spots something odd in a crater. He contacts Jan and goes in for a closer look. A giant lava monster appears and as Jace flys by, the thing throws a ball of lava and hits Jace's ship causing him to land on the surface.
Jan contacts Space Ghost and he comes to pick her and Blip up. They go to where Jace was and they too see the lava monster. Jace sends up a couple of flares to let them know that he is okay and Space Ghost puts the ship on inviso power. The lava monster is still able to hit them and Space Ghost knows that he must stop the thing. They put out the fire and land. Space Ghost tells them to stay low and he will try and put the monster back where it came from.
After several attempts, Space Ghost realizes that he will have to use full power to knock the thing back. He is finally able to push it back to the crater where it came from and he instructs Jan and Jace to seal the crater. They use the freeze ray and seal up the lava crater. Space Ghost flies the Phantom Cruiser back to Ghost Planet as Jan chides Jace for trying to get out of his homework.