In Iyi village, villagers worship the mermaid deity Mami Wata (Evelyne Ily Juhen) and turn to their healer Mama Efe (Rita Edochie), the intermediary between them and Mami Wata, as well as Mama Efe's daughter Zinwe (Uzoamaka Aniunoh) and her protegee Prisca (also Evelyne Ily Juhen). When their children begin to die and disappear, local resident Jabi (Kelechi Udegbe) casts doubt on the population, while Zinwe flees, driven by her own anguish. Soon, the arrival of rebellious warlord Jasper (Emeka Amakeze) tips the scales in Jabi's favor. With the village under new control, Prisca and Zinwe must plot to save their people and restore Mami Wata's glory to Iyi.