Mako is a magical Island that a pod of mermaids call home. Their peaceful lives are turned upside down when Zac, a merman develops a connection with the island that poses a threat to their existence. Ondina and Mimmi, two young mermaids from the Mako pod, are determined to break Zac's connection to Mako Island and reclaim Mako for the pod. As the mermaids struggle to take back his powers, they discover that his connection with Mako isn't quite an accident. New mermaids and mermen are met along the way, and some are even created!