At the magical Circus Astra, Elio helps his father look after Tangles – miniature tigers, mice with butterfly wings and a peacock made of ice crystals. Always on the move, the circus puts on incredible performances across the land of Whetherwhy under the stern eye of their ringleader Stella.

But after the arrival of mysterious visitors to one of their performances, Elio discovers that he has something the queen of Whetherwhy wants, something she will stop at nothing to get. Elio must leave the circus behind and team up with some unexpected friends, on a journey that will take him to the very edges of the map … and to discoveries that will change everything: for himself, and for all of Whetherwhy.