After a close call escaping Ogres, Grammi believes it is time to teach another Gummi Bear how to make Gummiberry Juice. Sunni is chosen as the most eligible candidate, but is more into fashion and spending time with Calla. Unfortunately, Sunni is unenthused by this calling and fails to learn the recipe to avoid spoiling the preparation.
The Ogres kidnap Grammi and take her to Castle Drekmore, where Duke Igthorn attempts to force the recipe for Gummiberry Juice from her. When the male Gummies go on a rescue mission for Grammi, they request Sunni to bring some Gummiberry Juice, which Sunni does not know how to make because she failed to pay attention to Grammi's lessons.
Regardless, Princess Calla convinces Sunni that they must try to help. Meanwhile, Grammi is tickle-tortured to reveal the correct recipe and Igthorn orders the juice's preparation. While Calla looks for the male Gummies, Sunni finds herself in the kitchen and plays along with the Ogres' mistaken impression that she is part of the crew. To that end, she attempts to create the juice, and finds that she is successful.
Unfortunately, Sunni gives herself away in her joy, and she quickly gathers a jar full of juice before she makes her escape. So equipped, Sunni is able to save Grammi from being murdered by Igthorn by getting the matron a dose of the juice. However, Igthorn is able to corner the Gummies and Princess Calla, and all seems lost.
Unknown to them all, Toadwart finds the pot of juice in the kitchen and is wrongly convinced that it still needs preparing and that he can do it. When Toadwart performs the last step, striking the pot with the stirring spoon, he causes an explosive wave of ruined juice to burst out of the kitchen and stun Igthorn's forces. This enables the Gummies and Calla to escape amid the confusion.
Afterward, back in Gummi Glen, Grammi and Sunni are cleaning up the kitchen. Calla comes to ask if Sunni can come to learn to use swords, and Grammi lets Sunni go, confident that she will be a fine juicemaker, someday.
- June Foray as Grammi Gummi
- Katie Leigh as Sunni Gummi
- Lorenzo Music as Tummi Gummi
- Noelle North as Cubbi Gummi, Princess Calla
- Will Ryan as Ogres
- Michael Rye as Duke Igthorn
- Bill Scott as Gruffi Gummi, Toadwart
- Paul Winchell as Zummi Gummi
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