When a mysterious threat moves towards Biltmore, bringing with it violent storms and flooding, Serafina must fight to defend all she loves and become everything that she is meant to be.

Serafina's defeat of the Man in the Black Cloak has brought her out of the shadows and into the daylight realm of her home, Biltmore Estate. Every night she visits her mother in the forest, eager to learn the ways of the catamount. But Serafina finds herself caught between her two worlds: she's too wild for Biltmore's beautifully dressed ladies and formal customs, and too human to fully join her kin.

After miraculously surviving a tumble through a powerful waterfall, sixteen-year-old Callum Harris awakes from a coma to find himself in a dark and dangerous version of the life he knew.