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.

A fatal oil spill, an explosion and toxic waste collide in the Gulf of Mexico and the results spawn a noxious mutation that terrorizes a beach community. Police sergeant (Devon Hughes) leads the investigation against an unscrupulous CEO (Michael Milhoan), but it's a quirky detective (Brian Edward Kahrs) and a tenacious environmental researcher (Wendi Hughes), who confront the zombie nightmare.