Hugo and Boone were having a bad case of Nothing-to-do-itis: They have free time but can't think of a single thing to do! Finally, they decide to head to Uncle Figgy's Toy Store, where they discover the legendary Mad Marvin presenting his new invention: the Marvelous Monster Magnet!

The only problem is the toy costs twenty-five nubbins--a huge sum! Hugo and Boone set off on an adventure to earn the money, a journey that leads them to a treasure hunt through the woods. As always, the friends will find much more than they expected!