The widowed Ellen Brody now finds herself reliving the horrors of the past when a mammoth shark kills her son. Grief-stricken, she travels to the Bahamas to be with her other son, a marine biologist, and his family. There she meets and falls for a carefree airplane pilot. But just as she is putting her life back together, the nightmare of the past returns when her granddaughter is attacked by an all-too-familiar Great White. Determined to end the terror once and for all, Ellen sets out for a showdown to the death. The action and tension build rapidly to a shattering climax in this, the most incredible Jaws adventure of them all.