According to legend, six sailors killed when shipwrecked 100 years ago in Antonio Bay, California, will rise to avenge their deaths when a strange glowing fog appears. The town is commemorating the centenary of the shipwreck and Father Malone discovers a diary kept by an ancestor; he learns that the ship was wrecked by six founding fathers of the town. The vengeance of their victims will be the death of six people. As daylight fades, a mysterious fog envelops the town and begins to strew panic and death.