The sinister siblings, twins Edgar and Ellen, kidnap the pets of Nod's Limb's youngest citizens and turn them into "rare beasts" in hopes of making money to finance future pranks.

Devious twins Edgar and Ellen scheme to thwart the mayor's tourism initiative, which, if successful, would destroy the town junkyard--the twins' favorite playground, foraging spot, and home to their beloved carniverous plant, Berenice.

Prankster twins Edgar and Ellen think they have found kindred spirits when they join the circus to escape from their mysterious caretaker and the one-eyed creature Pet, but they soon discover that it is hard to tell friend from foe.

When the founder of the town of Nod's Limbs returns after a two hundred year absence, trouble-making twins Edgar and Ellen attempt to discover who is trying to steal the secret that kept him alive all that time, while they also scheme to sabotage the town's mayoral election.

Searching for their arch-rival, who has discovered the secret of eternal life, twins Edgar and Ellen find unexpected dangers and obstacles that force them to split up in order to accomplish their mission.