Jimmy Crikey is the alien orphan who, despite the bullies, chose to make his home on Earth in the magical lands of Roombelow. He numbers the Four Guardian Witches of Earth's realms among his friends, which includes Lord Oron, and The Weatherman.
The leader of the Guardians, Witch Matilda, has chosen the remarkably young Diamite, Jade, to become her apprentice. Jade is approaching the end of her apprenticeship with Matilda. But there are several challenges to complete before she becomes a fully qualified member of the sister's Coven. Jimmy is told she is asked not to help Jade directly. She must succeed in the trials using only her skills.
When collapsing roofs threaten the cave world of Lithnia, both Jimmy and Jade's skills are needed to save Lithnia from the giant, rock-chewing beatles who originated in Egypt as scarabs.
Then the Sky Islands are caught in tornado winds and a whirlwind. The Islands are about to be torn apart, and Matilda instructs Jade to go to their aid. Jimmy is forbidden to interfere but he does help Jade to carry out her plan to save the Islanders. Can the youngest witch overcome the danger?
Madam Cleoptra, the ruler of the Sky Islands, has given birth to Lord Oron's son, Uran, and he must be introduced to the Coven of sister witches.
The dreaded Giant Scarabs return to their destructive chewing of rocks, threatening Roombelow, far away from Lithnia. Jimmy and Jade trace the beatles resting place to a floating island in the Arctic seas, where the Centaurians, a race from planet Xe in the Alpha Centauri system, are collecting diamonites from Lithnia to protect their planet from the gamma rays emitted by one of their suns. To save their world, they would risk destroying Earth. Jimmy employs XRU, his talkative starship's navigator, to help the aliens to resolve their plight without bloodshed.
Then Matilda launches a bombshell: she has been called to move to a higher realm. Who will be appointed as her successor?