An ancient Chinese artifact has been stolen by a villainous archaeologist named Dexter. With the help of his Lemming friends, Norm must keep his word and embark on a journey across the world to help recover the artifact for the people of China.

When Norm returns to New York, he is falsely accused of a crime and must work with his pals to get the case dismissed while also protecting his kingdom in a winner-take-all hockey tournament.

Nesta nova aventura, Merliah aproveita sua vida de surfista nas ondas da Austrália, enquanto curte o fundo do mar como sereia. Até que uma rival muito competitiva ameaça a segurança do Oceano ao libertar a malvada Eris. Merliah precisará da ajuda de seus amigos e das sereias embaixadoras para tentar salvar o oceano e ganhar a competição de surfe. Será que ela conseguirá?