On Gullstruck Island the volcanoes quarrel, beetles sing danger and occasionally a Lost is born . . .
In the village of the Hollow Beasts live two sisters. Arilou is a Lost - a child with the power to depart her body and mind-fly with the winds - and Hathin is her helper. Together they hide a dangerous secret, until sinister events threaten to uncover it. With a blue-skinned hunter on their trail and a dreadlocked warrior beside them, they must escape, or risk everything. Can the fate of two children decide the future of Gullstruck Island?