When the famous confectioner Sir Paunch announces his plans to retire, Tummi, Sunni, and Cubbi manage to get a hold of his secret recipe. And Toadwart's smart and bossy cousin, Tadpole, initiates an insurrection among his fellow ogres.
Igthorn tries to infiltrate Gummi Glen by magically switching places with Tummi while the bears plan Tummi's birthday surprise. And after a tiring lesson of horseback riding, Sunni witnesses an ugly witch banished from an adjacent kingdom.
Tummi wants to learn magic. Cubbi uses stunts to fool Tummi into thinking that he is the real deal, but when Igthorn captures Tummi, Cubbi must think of a way to free him. Then, the trolls escape and start looking for their stolen gold.
When Tummi apparently wipes out the Gummi Berry crop through his own stupidity, he sets out to a long-abandoned Gummi agricultural region to attempt to find the materials needed to reestablishment it.
Sunni and Gusto meet a mermaid and her sea beast guardian. And then, Gusto invents a decoy to lure ogres away from Gummi Glen. While it does fools the ogres, it also attracts the humans, who start looking around the forest.
While trying to find out why winter is still persisting in Dunwyn alone, Tummi, Sunni, and Cubbi encounter a frost giant who uses a wind horn to freeze everything. Then, Sunni saves a squirrel-like shapeshifter and takes it back home.
When the castle of the knights of Gummadoon appears, Cavin is imprisoned as a spy. The Gummies only have until sunset to rescue him, as the castle only appears once every hundred years, but they also have to contend with Duke Igthorn.
A Gigglin causes a practical joke spree in the Glen. And the, after the egg of a griffin rolls free, Cubbi gets mistaken for the baby, whilst Gruffi has to deal with the actual baby griffin, who thinks that he is his father.