When a royal messenger announces that Queen Edwina is coming to tea, Shelly is as jittery as a jellyfish! After all, the Queen of the Western Oceans is her great aunt. And despite being a princess, Shelly has never met a queen before. How should she act? What should she wear?

Then Pearl tells Shelly that the queen is going to take Shelly to live in Neptune's Castle: "It's where a real princess would live," Pearl tells her. Shelly is terrified of leaving her home, friends, and beloved grandfather behind. When the royal carriage arrives, she's trembling from the top of her head to the tip of her tail. What will Queen Edwina think of Princess Shelly? And will she really take Shelly away from the home she loves?