This is a story that will change history. Simidele is one of the Mami Wata, mermaids duty-bound to collect the souls of those who die at sea and bless their journeys back home to the Supreme Creator. But when a living boy is thrown overboard a slave ship, Simi saves his life, going against an ancient decree and bringing terrible danger to the mami wata. Now Simi must journey to the Supreme Creator to make amends—a journey of vengeful gods, treacherous lands and legendary creatures. If she fails, she risks not just the fate of all Mami Wata, but also the world as she knows it.