A marine biologist looks into reports that a mermaid is menacing people along the Oregon shore.。从小善于做生意的团宠乖宝小鱼儿和她的父母经营着长安最大的荣唐客栈，因为生意火爆招致朱大盛和其他同行算计，小鱼儿便拜楼云涛为师学习武艺保护家人。楼云涛不想天真可爱的乖宝卷入江湖纷争，便教会她幻术自保。
