He's heard it all before, 'One day, Tommy, you'll rule the World, ' He shrugs it off. Aided and abetted by his twin sister, Tommy gets on with growing up, and quite stupidly plays an innocent prank on the humans. But, as their civilisation faces growing threats from climate change, invasive immigrants and the Roman navvies, their innocent prank turns sour. Can the tribe survive the nightmare? This...