An amnesiac sorority member who has been plagued by a recurring nightmare is stalked alongside other coeds by a killer in a deserted department store where they are completing a hazing ritual.

This third film in the series follows a group of marine biologists attempting to capture a young great white shark that has wandered into Florida's Sea World Park. However, later it is discovered that the shark's 35-foot mother is also a guest at Sea World. What follows is the shark wreaking havoc on the visitors in the park.

Daytona Shepherd (Will Bledsoe) and his sister, Carole Lee (Mary Davis), operators of Good Shepherd Tow Service, are pitted against a band of dishonest tow truck operators.