Years of protection. One violent storm. A mysterious island that won't let them go.

Leah has spent her entire life shielding her younger sister, Clara, from the dark and cruel realities of their home. But when their mother dies and their father suddenly vanishes, the sisters are forced to run for their lives, escaping across the open water—until a ferocious, unnatural storm tears them apart.

They wash ashore on opposite sides of a hidden island, each taken in by a completely different village. For the first time in their lives, they are entirely alone. Clara must learn to find her own strength without Leah to protect her, while Leah stops at nothing to break through enemy territory and find her sister.

Surrounded by extraordinary people with dangerous gifts and deadly secrets, the sisters realize too late: the island has plans of its own.

Will Leah and Clara find their way back to each other, or will the island keep them apart forever?