With power comes the responsibility to accept its consequences. After the betrayal of those closest to her, Eviana Dumahl struggles to cope with her new reality. Kidnapped, broken, and confused, she is forced to engage in a war that will alter merfolk politics forever. With her estranged father leading the charge, Eviana has no choice but to stand by his side. Her continued existence hinges on the acceptance of the power growing inside her, even when that means embracing the family’s dark lineage. Kain Matthew will sacrifice the world for Eviana. And he is not alone. As time runs out, her friends fight to save her life and theirs. An unlikely alliance gives them the edge they need to take a stand, although it keeps Eviana’s heart trapped in the past. A new discovery explains some of her previous mistakes, but it may not be enough to stop her father’s plans. Merfolk, selkies, and water sprites work together to save their kind, only in this final battle, not everyone will survive. In the striking series conclusion, Eviana will learn the true meaning of power, sacrifice, and love.