When the Faerie folk flee their world and come to ours, running from the nightmare of war, nobody in the everyday knows what to do. So they are locked away.

Thirteen-year-old Samm Wolfback lives in Glass Forest, a sprawling Faerae refugee camp in England. Life in Glass Forest is hard, poisoned by disease and crime and poverty. But Samm has a unique gift that lines his pockets – he can find lost things.

When Samm is thrust into the centre of a plot to escape Glass Forest and return home, he must use his gifts to unearth two treasures lost in the everyday: a relic that will end the war back in Faerae; and the only person with the power to reopen the door between worlds – the Locksmith. The task will take Samm to dark places filled with danger, from a grimly enchanted circus of nightmares to a museum housing a murderous exhibit, and he will have to use all of his skills to stay alive.

Meanwhile, in the human world, a kidnapped boy with a dark secret begins to realise that he might hold the key to the Faerae folks’ fate. Before all is said and done, destiny’s web will entangle him with Samm and send them spinning towards a showdown with the great evil that lurks in the world beyond the door.