Astrid has her wings at last. But unlike all her Starminster classmates, she can’t get them to work, no matter how hard she tries. Soon, the formidable new headmistress issues a warning: Astrid must learn to fly, or leave London Overhead forever.

Then the Month of Birthdays arrives, bringing circus shows, rollercoasters, mountains of cake – and a legendary series of games, with a prize beyond Astrid’s wildest dreams.

Astrid knows she has to win; it’s the only way she can fix her wings, and secure her home in London Overhead. But the games are far more dangerous than she could ever have imagined – and someone is out to ensure Astrid never makes it to the end.