There's an atmosphere in the air in Triassic dino world, as Jamie, Tom and Wanna set out to explore. Suddenly with a crash of thunder and a flash of lightning the friends find themselves in the middle of a violent prehistoric storm. As they scramble to get to higher ground they find a hidden cave - at last, some relief from the torrential rain! As they look around they realize they're sharing their shelter with hundreds of sharp-fanged pterosaurs. If they keep still and quiet they should be safe - but when Wanna makes a sudden noise, the pterosaurs begin to swarm . . .