Transformed by the goddess Yemoja into a Mami Wati, an African mermaid charged with collecting the souls of those who die at sea, Simi goes against the gods to save a living boy, Kola, from drowning.

When signs of the eight ajogun begin to appear, Simi teams up with the corrupt trickster god Esu to stop the demon warlords before they enter the human realm and ruin humankind. To save those closest to her, Simi traded away everything: her freedom, her family, and the boy she loves. Now she is sworn to serve a new god, watching over the Land of the Dead at the bottom of the ocean. When signs of demons begin to appear, it is clear there are deeper...