One of the Norse gods’ Apples of Immortality falls out of Asgard and lands in a pigpen in the village of Mirkmudd. A hero must return it to Asgard, and Byff Thunkersen and his friends volunteer to the quest. The heroic team must pass through many Norse ordeals to reach their destination, in the form of mazes through the Nine Worlds. This includes places such as Domain of the Dead, Realm of Ice, Land of the Giants, Land of Dwarfs, Domain of the Dark Elves, Land of the Light Elves, and World of the Gods. On the way they must collect a further nine golden apples. The story of Byff and his friends is introduced with a three-page narrative cartoon strip, and concluded with a cartoon page.
