 When the curse came true and the child turned into a mermaid on her seventh birthday, Esther realized that Cristina's life would be endangered in their superstitious fishing village, where mermaids are believed to be unlucky.As such, Esther is forced to release Cristina in the sea, where she is found and cared for by the mermaids headed by "Istah", their beauteous queen.With the heart and mind of a human being, Cristina, now also known among the mermaids as Marina, dreams of nothing else but to walk again and live the life that was taken away from her.