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.。李成功看到那个电话号码的时候，脸色直接就冷了下来：“这是李天的号码啊，看来他这是从中搞事情，而且之前小雅在给那些姐妹们打电话的时候，肯定是被他得知了什么消息，她的那些姐妹，除了王姐你之外，其他的人我一……