Seventh grade is a lot for scrawny little Dave Dombrowski to handle. He wants to achieve greatness by trying out for the football team. But when he and his little dog explore their special place in the neighborhood woods, they find out the "King of Karvenience" wants to wipe the spot out to build his business. Dave and his dog discover a cave with an ancient painting that seems to have magical properties. Every morning, Dave and Scout wake up changed: they're getting stronger and meatier--from the feet up! The new Dave is a hit on the football field but suddenly not so hot in the classroom. If he can't save the woods and the cave, he might be stuck as a caveman forever.