A fellow scientist accidentally creates living energy that only lives to feed on more energy, including that from living organisms. The Quest party answers his plea for help.
Dr. Quest heads up the Amazon to the Land of the Turu in pursuit of high grade trinoxite, a new metal essential to the space program, unaware that "Turu" is a live pteranodon guarding the deposit.
En route to a Norwegian castle, Jonny can't get the others to believe he saw a periscope following their boat through the fjord, then later seeing a stone gargoyle move.
Someone goes to great lengths to keep activities in the Quetong swamp lake area private. Dr. Quest gets involved when asked to determine why local fish are suddenly starting to make area fishermen sick.
Home movies from India remind the Quests how Hadji came to join their group back when Dr. Quest had dealings with a secret nerve gas factory in the snowy Himalayan mountains.