When top scientist Carl Wiseman announces that a gigantic asteroid hurtling towards Earth will miss completely, Stegz is suspicious - his calculations say it's going to sideswipe the Earth, causing terrible damage! The Dinosaurs are right to be suspicious: the Raptors forced Wiseman to lie and then kidnapped him to keep him from warning everyone. They think the asteroid impact will push Earth closer to the sun, making it a lot warmer .... too warm for humans, but just right for Raptors! The Extreme Ones must rescue Wiseman from the Raptors, and find a way to stop the asteroid before it's too late.