Betrayed by someone they thought was a friend, Henry and Lucy make their way to China in search of the third piece of the clasp. But friends aren't the only ones in the business of deceit and betrayal, and soon Henry finds himself sick and powerless on the streets of New Luoyang.

With no language and Henry growing sicker by the day, Lucy fights desperately to find the next piece without losing Henry—in more ways than one. Because although Henry is surrounded by enemies on all sides, the most dangerous foe might be the dark doubt that is growing in his own heart.

Will Henry fly or fall in the exciting fourth book of The Determiner series?