Enchanted by the idea of locating treasure buried by Captain Flint, Squire Trelawney, Dr. Livesey and Jim Hawkins charter a sailing voyage to a Caribbean island. Unfortunately, a large number of Flint's old pirate crew are aboard the ship, including Long Jane Silver.

An unhappy male takes a classroom of children and their teacher (Patsy Kensit) hostage with a set of explosives strapped to his body.