Samuel and Anna are sent back to the Cretaceous on a seemingly easy mission to simply observe dinosaurs, disturb nothing and return safely.

But back in the Science Museum, a theft has left Norus’ power waning; he can no longer bring them back!

Stuck in the Cretaceous period – with a ferocious herd of Triceratops, a vicious T-rex and other dinosaurs – Samuel and Anna face their biggest test yet.