Zac is a teenage boy who decides to camp on Mako Island, unaware that three mermaids, Sirena, Nixie and Lyla, who are guardians of the island, are watching him. That night, when the full moon rises, the boy comes into contact with the magic water of the Moon Pool. The following morning, Zac wakes up discovering he has become a merman with a fish-like tail and the ability to control and manipulate water. His new-found merman abilities will cause problems for the mermaids. The three mermaids, curious about living on land, are transformed into humans while in the moon pool during a full moon, now having the ability to live like humans.
主演：格蕾丝·万德沃尔,朱迪·格雷尔,乌玛·瑟曼,贾德·赫希,Ben Geurens,莎拉尤·拉奧,克里斯·威廉斯,艾尔·马德里加尔,萨拉·阿米尼,维克托·沃尔夫,尼基尔·派,Joey Jennings,Matthew Bridges,Heather Grace Hancock,Elijah Richardson,Geo Lee,Tyrel Jackson Williams