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.。几封书信来往后老太太才知道，这位去年醮会的时候曾在白云观中见过虞襄一面，对她惊为天人、思之不忘，好赖都要娶她为妻。他父亲虽然不重名利，母亲却是个精于算计的，有心攀附侯府权势，又听说苦慧大师已治好了虞襄……