Fangbone discovers a real Skullbanian clan on Earth masquarding as medieval reenactors. But when he enlists their help against Drool’s undefeatable Dreadhorn, they run in fear. Bill uses their theatrical skills to put on a Battle Royale against an unsuspecting Fangbone that makes the Dreadhorn question going up against such a formidable foe.

Fangbone struggles to understand his destiny written in the stars of the planetarium, when thanks to Drool, he sees the Moonbear of No Tomorrow - a sure omen of his impending end. Bill tries to convince Fangbone that destiny is what you make it as he’s forced to be the sole protector of the Toe and fight off the come-to-life Moonbear.

Bill's bummed that no one can know about all the cool monster fighting he and Fangbone do. But when Drool sends out Melodica, the Lady of the Lute, to sing about their 'glory' – and steal the toe – Bill forgets about the need for celebrity and challenges Melodic to an epic rap battle with the fate of both worlds at stake!

On an overnight trip to the museum, Fangbone and Bill discover a Skullbanian relic that transforms a mural into a gateway to a Skullbania-like world. It’s exactly what Fangbone needs to cure a bout of homesickness! But when a Razor-worm escapes into the museum and cocoons his classmates, Fangbone faces a tough choice – to save his friends he must smash the relic and lose this connection to home forever.

When Bill convinces Fangbone to stay inside all day watching movies, Fangbone comes down with Hovelfroth, a barbarian affliction that turns him into a wild animal.

The legendary Stoneback arrives to help protect the Toe, but Fangbone's star-struck and unwilling to listen to Bill, who suspects that this might not be the real barbarian deal.

At parent-teacher night, Fangbone and Bill are forced to pretend Twinkle-stick is Fangbone's totally normal human parent.

After a series of omens, Stoneback's legendary sword falls from the sky.