Prince Rhen, heir to Emberfall, is cursed to relive the autumn of his eighteenth year—unless a girl falls in love with him. Each failed cycle ends with him transforming into a monstrous beast, leaving devastation in his wake.

Harper, a fierce and determined girl from Washington, DC, is unexpectedly pulled into Rhen's world while trying to save a stranger on the streets.

Together, they must navigate the treacherous challenges of the curse and face opposing forces that threaten to destroy Emberfall. As time runs out, one question remains:

Can Harper break the curse before Rhen becomes the beast forever?