伯尼回来了，孩子们都很高兴。但他们的宿敌温斯顿也一样，他即将绑架这只天才海豚。凯文和霍莉必须在为时已晚之前救出他们那泼辣的朋友。 The kids are thrilled that Bernie has come back. But so has their old enemy Winston, who's about to kidnap the talented dolphin. Kevin and Holly must rescue their splashy friend before it's too late.
墨西哥湾发生致命的石油泄漏，爆炸和有毒废物碰撞，结果产生了一种恐吓海滩社区的有害突变。警察警长（德文休斯）领导调查一名不道德的首席执行官（Michael Milhoan），但这是一个古怪的侦探（Brian Edward Kahrs）和一个顽强的环境研究员（Wendi Hughes），他正面对着僵尸的噩梦。