Simi prayed to the gods once. Now she serves them as Mami Wata—a mermaid—collecting the souls of those who die at sea and blessing their journeys back home. But when a living boy is thrown overboard, Simi does the unthinkable—she saves his life, going against an ancient decree. And punishment awaits those who dare to defy it. To protect the other Mami Wata, Simi must journey to the Supreme Creator to make amends. But all is not as it seems....