In the Kingdom of Glass, Prince Caesar, a war hero cursed to turn into a beast, brings Abel, a gifted perfumer who looks just like his late lover, to the palace. Mistaken for a replacement, Abel repeatedly clashes with Caesar. From falling into an abyss beneath an icy bridge to Caesar losing control of his beastly nature at his coronation, they face one deadly trial after another. Abel eventually gives up on curing the curse and stays by Caesar's side as he learns to control his beastly side. Together, they stop Prince Loren from taking the throne. As Caesar is crowned king and accepts his curse, Abel finally stops seeing himself as a substitute, and the two learn to love each other for who they are.
