The beautiful paradise island Melonia is inhabited by the sorcerer Prospero with his daughter Miranda, the albatross Ariel, the good-natured vegetable-faced gardener Caliban and William the dog-nosed poet. They live a generally peaceful life, except for Caliban who has to work hard with the garden. A few miles away lies the dark island Plutonia, where the greedy industrialists Slug and Slagg rule. Once as green and flourishing as Melonia, Plutonia is now perceived as hell on earth, where children are forced to, under slave conditions, build weapons and tools of war, which Slug and Slagg believe is the way of the future. With Plutonia’s resources nearly exhausted, Slug and Slagg turn their gaze on the unexploited Melonia, scheming to take it over with a gigantic drill.
The movie begins with one of the child slaves, a boy named Ferdinand, escaping from Plutonia in a box, and ends up on Melonia, where Miranda and Prospero nurse him back to health. Prospero has just finished a magical growth elixir (humorously labelled “power soup” for the remainder of the movie), which Caliban is entrusted. Slug and Slagg kidnap Caliban and bring him to Plutonia. Ferdinand, Miranda, Prospero and some others journey to Plutonia in order to free Caliban, which eventually turns into a quest to free Ferdinand’s enslaved friends. Eventually, Miranda helps the children escape by transforming them into birds and transporting them into an old theater, where William the poet is making a less than successful attempt at staging Shakespeare’s The Tempest. After breaking out of his prison, the thirsty Caliban thoughtlessly drinks the elixir. Slug and Slagg, encouraged by Caliban’s growth, attempt to coax him into working for them, but their rants of superiority by arms falls upon deaf ears. They then attempt to destroy Caliban using the great drill, but he easily lifts it off the ground and plunges it into the floor, causing the island to sink to the bottom of the ocean in a gigantic maelstrom. —Wikipedia
