When Princess Avali flees her early coronation to a small town and meets Anderson, a famous celebrity look-alike, a viral video causes a comedic identity mix up, having everyone guessing "who's who?"

Tiana, Moana, Snow White, Rapunzel, and Ariel are off on an adventure as they are each unexpectedly transported to a mysterious castle. Shortly after arriving, they soon discover that Gaston has hatched an evil plan to take over all their kingdoms! The Princess characters must work together to solve challenges hidden deep within the castle walls and try to save their kingdoms from Gaston. Will bravery, quick-thinking, and teamwork prevail?