Ann Stavely watches person after person disappear through the farm's gate--and never come back out again. Later she meets a tormented sorcerer, Mordion, who seems to have arisen from a centuries-long sleep, but Ann KNOWS she saw him enter the farm just that morning. She also meets the boy, Hume, who keeps changing his age.
Hexwood Farm is a place where nothing can be taken for granted. It is full of machines that should not be tampered with - when one is, the aftershock is felt throughout the universe. Only Hume, Ann and Mordion can prevent an apocalypse - but are they too being altered by the whims of Hexwood?