The Son of Svengoolie appears after the original Svengoolie disappears, and shows a film "that make Dawns of the Dead look like Godzilla meets the Brady Bunch" called "In the Year 2889."
In a night-quest of lady Jill who disappeared suddenly from her house at a coastal English village, Ben and Harold follow encrypted underground passages leading from the house to a volcano threatened sub-sea ancient city with hostile inhabitants.