When Joe Talbot's backpack is confiscated, Wishbone and Joe Talbot must confront a scary neighbor with a Big mean dog to get it back.

This reminds Wishbone of the old English tale Beowulf. Imagining himself as the great hero Beowulf, Wishbone must defeat a series of monsters who are ravaging the kingdom.

A lifetime of adventure takes him on a collision course with his greatest foe yet. And this time, it will take more than courage to defeat this monster. It will take a hero with four legs and the heart of a warrior!