Molly grew up hearing the tales of Haviland Stout, her ancestor who discovered the dangerous magical spirits that inhabit the far corners of the world. Now, on the edge of the New World, in the British Dominion of Terra Nova, Molly and her family collect spirits aboard their airship, the Legerdemain. But when Molly captures a spirit that can speak and claims to have been Haviland's friend, her entire life is upended. What if everything she knows about the spirits, and her own history, is a lie?