Being half angel, half demon meant Celeste Castor's life was spent constantly trying to stay one step ahead of those determined to end it. Sure, it wasn't perfect, had its ups and downs but she'd learned over the years to adapt with speed to whatever was thrown her way, but all it took to derail her was one massive curve ball which hit in the form of an angel and demon.

Their arrival brings in its wake unexpected revelations, ones leaving the three of them having to find a way to work together – or lose everything.