After unearthing a gem that controls an evil monster looking to destroy the Universe, a young girl and her brother use it to make him do their bidding.

Siblings Mimi and Luke unwittingly resurrect an ancient alien overlord. Using a magical amulet, they force the monster to obey their childish whims, and accidentally attract a rogues' gallery of intergalactic assassins to small-town suburbia.

After unwittingly resurrecting The Archduke of Nightmares, an ancient, murderous creature from the Planet Gigax, brother and sister, Luke and Mimi, have a crisis on their hands. On the one hand, the only thing that stands between the alien overlord and global annihilation is a strange pulsating gem of destruction, and on the other hand, the demon's arch-enemies called The Templars, have already dispatched Pandora, a mighty, sword-wielding defender, to stop him at all costs. Now, it seems that whoever wins, humans lose. Can the little suburban siblings control the beast, and in the process, save humankind?—Nick Riganas