When Great Aunt Busyboots catches a cold, Penny steps in to host a tea party for Queen Alana Apple and make a royal request for the Pineapple Parade.

Penny and her Great Aunt Busyboots decide to swap roles for the day so the queen can have a princess adventure and Penny can practice being queen.

When the seed silo breaks on the eve of their coronation, the princesses follow a riddle that sends them on a voyage to the Cave of Sparkleseed Secrets.