As Duke Igthorn plans an attack on King Gregor's castle, Cavin (a page in the castle) is left in the woods after some of Igthorn's ogres run off the Humans. The Gummi Bears find Cavin passed out in the woods with a Great Gummi Medallion, that was left to him by his grandfather. When he proves he is a friend, the Gummi Bears and Cavin team up to stop Igthorn's plans.
Sunni is kidnapped by a flock of ugly bird-like creatures known as Carpies, whose king wants her for a song bird. The other Gummies must use their new flying machine to get to the top of the mountain and rescue her.
In "The Oracle," Tummi finds a stone ogre oracle and uses it to trick Duke Igthorn and the ogres with it. In "When You Wish Upon a Stone," Cubbi and Cavin find a wishing stone in a cave guarded by a giant.
"The Fence Sitter": a bird is eating all the gummiberries, and Tummi's vote will decide how the Gummies are going to deal with it. "Night of the Gargoyle": Duke Igthorn sends a gargoyle to King Gregor with a note signed "The Gummi Bears". The gargoyle comes alive at night and starts to destroy things.
Tummi befriends a blind lady shepherd. Duke Igthorn catapults Toadie into the forest, where he makes his way into Gummi Glen. When Tummi, who has been caught eating the other bears' picnic lunches and lying about it, sees him, no one believes him when he tries to tell them.
"Bubble Trouble": While reclaiming her forgotten gummiberry juice, Sunni stumbles on a lost infant cliff dragon who swallows the bottle whole then hiccups flame-filled bubbles. Igthorn sees them and steals the dragon to attack Castle Dunwyn. "Gummi in a Strange Land": Gruffi's attempt to grab honey results in a panicked slumber sprite's putting a spell on him, forcing Grammi and Cubbi to follow the sprite as he drags his honey supply into Drekmore...and somehow battle its evil plants and animals and stop Gruffi from sleepwalking into danger at the same time.