Amity Island has been plagued for years by a huge shark that has killed many people, including Ellen Brody's husband who lost his life while trying to catch the monster. Now Sean Brody, one of Ellen's two sons, has been killed by the shark. Ellen travels to the Bahamas to comfort her other son, Michael, who is a marine biologist, and to enlist his help in stopping the shark's reign of terror.

Amity Island continues to be plagued by the huge shark who has killed many people, including Ellen Brody's husband and now her son, Sean. Ellen enlists the help of her other son Michael, who is a marine biologist to stop the monster once and for all.