Darwin, 1942, and as Japanese bombs rain down, motherless Molly Hook, the gravedigger's daughter, is looking to the skies and running for her life. Inside a duffel bag, she carries a stone heart, alongside a map to lead her to Longcoat Bob, the deep-country sorcerer who she believes put a curse on her family. By her side are the most unlikely travelling companions: Greta, a razor-tongued actress and Yukio, a fallen Japanese fighter pilot. The treasure lies before them, but close behind them trails the dark. And above them, always, are the shimmering skies.