An unexpected gift offers the power to change everything—but keeping it could cost Diem her life.

The threat of war has arrived at Diem’s doorstep, along with a new discovery that could save her people. To use it, she must survive the next thirty days by forming a devil’s bargain with the people she hates most: the royal family of House Corbois.

But as she dives into the world of the Descended elite, Diem quickly realizes good and evil aren’t as simple as they seem. Old prejudices are challenged, and new loyalties blur the line between friend and foe.