John Perry Edson

11-year-old Davey's mother is dead and his father doesn't spend nearly enough time with him. So the boy loses himself in video games--and even has an imaginary friend, a super-resourceful secret agent. When he accidentally comes into possession of a spy group's secret plans, and winds up on the run from them, he must learn to rely on himself and his imaginary pal to save his skin.

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.