What if you found a perfect world – but no one believed you… ?

Twelve-year-olds Willa and Manny hear of a mysterious animal prowling the beaches of Whitley Bay and are determined to prove it is real. When they follow it into a flooded cave one full moon, they are swept into an alternative, ideal, world – one where disease, pollution and war have been conquered decades ago.

But no one believes them, so – with a devastating global conflict looming in their own world – their quest for proof that a World Without War can exist becomes ever-more urgent, in a nail-biting race against time and tides.

And ultimately, they will have to make an impossible decision: because once you find a perfect world, can you ever leave it behind… ?