Step back in time for a prehistoric adventure! Eager, young velociraptor Mateo Raptor has made an interesting find during his class's archaeological dig. He presents the odd, rectangular object to his uncle, Dr Raptor, an ambitious scientist. Inside the shiny slab is a clue about the destiny of long-lost, world-famous scientist Ernie Stegosaur. This find leads Mateo, Dr Raptor and the doctor's lab assistant, Darby, on a fascinating journey to the centre of the Earth!