Doctor Amy spends her nights running a secret clinic for supernatural creatures. When she is forced to use her magic to save the lives of a centaur infant and its mother, she vows never to regret her decision, no matter the consequences. Not even when the Mages capture her, beat her, and condemn her to die.

Before the sentence can be carried out, Amy is abducted by a mysterious being named Rowan, who demands she use her healing abilities to save his father. But when Amy fails to save the ailing man, her actions unintentionally force Rowan into an exile that will soon turn into a death sentence.

Now Rowan and Amy must join forces with the creatures who were once her patients and fight to uncover the one secret that may be powerful enough to save them all.