Rowan is just an ordinary boy. He likes reading books and playing with his toys, and he likes daydreaming about going on adventures to places he's read about. But Rowan's imagination is different. When he daydreams about places, he goes there!

One day, whilst playing with his toy dinosaurs, Rowan starts to feel a little sleepy. And the next thing he knows, he's back in the time of the dinosaurs. Looking around, he can see plants, animals and... a stegosaurus!
And that isn't his only adventure. He meets pirates, cowboys, cavemen and astronauts as well! Let's just hope that he manages to get back home without any trouble. Not everyone and everything he meets is friendly.