Merlia lives in Oceania. She needs to go on a short trip. The protagonist of the fairy-tale cartoon "Barbie: The Adventures of the Little Mermaid 2" is already awaiting Australia. Here, a young girl will try her hand at the upcoming surf competition. She has every chance to become a winner of the championship. But here all the plans of Merli violates the insidious and very cruel Eris. She manages to leave the whirlpool. This heroine plans to become the sole mistress of vast Oceania. Eris sees himself only on the throne of the ruler. The main character of the cartoon is well aware that the villain can bring many troubles to the inhabitants of the kingdom. Therefore, she should stop Eris as soon as possible. The princess mermaid assumes herself loyal and devoted comrades who are always ready to support Merlia in difficult situations. The insidious villain will not be able to subjugate the underwater world. She will have to pay for all the evil that managed to inflict innocent inhabitants of Oceania. But will the mermaid forget to take part in the championship with all these matters?