When Merliah travels to Australia for a surfing tournament, a jealous competitor steals her mermaid magic and releases the evil Eris from her prison, and Merliah must save the mermaid kingdom without her mermaid powers.
Sheriff Woody and his deputies, including Jessie, Buzz Lightyear, and a giant dinosaur, work together to stop the outlaw One-Eyed Bart and his wife from making a getaway after a train robbery.
Mariposa becomes the royal Ambassador of Flutterfield, and is sent to forge a lasting peace between her fairy land and their rivals, the Crystal Fairies of Shimmervale.