Emma returns

Taking place one month after the season 3 finale, Emma returns to the Gold Coast after 9 months of traveling the world. Excited to reunite with her BFFs, Rikki and Cleo, she soon sees they no longer wear their lockets as well as have met a new mermaid: Bella, who they've befriended. Tension arise between the girls as mixed emotions flow. When Rikki and Cleo become trapped in a dangerous situation, Emma and Bella will be forced to put their differences aside and help their friends.