Stella crowns herself queen of a seaside kingdom and bestows knighthoods on Sam and Owen so her sandcastle will be protected. But a driftwood dragon threatens their fairytale world and our heroes must stop it from stomping their castle.

Sam's day gets off to a bad start when he spills toothpaste and breaks his toy airplane. When Stella tells him about an ancient Egyptian jewel that brings good luck, Sam is eager to cross a desert to search for it.