Like most children, Lark Marin knows to never trust the fae. In her village, the border between their worlds is as thin as a whisper -- preserved only by the ritual of humans and fae racing in the dangerous Wild Hunt. Lark has always, eagerly watched her siblings ride, until one year something goes wrong, and Lark's brother, Galin, disappears into the fae kingdom. Lark is desperate to find him, so when a mysterious fae boy called Rook approaches her with a bargain -- help him mend an arcane clock and he'll help her find Galin -- Lark takes the chance. She know he should never trust a fae, but right now, trusting is the bravest thing she can do. Soon she's on a quest that takes her into the dangerous fae kingdom, and with only a broken clock and Rook by her side, she'll have to untangle fae riddles, face the wicked fae king, and set time straight again or lose her brother forever.