❛ COME ON IT JUST GETS BETTER, SO MUCH TO DO AND SUCH LITTLE TIME ❜ Emma returns from her travels to find that Cleo and Rikki have found another friend-a mermaid, just like them. She feels replaced in the group, like it was just that easy to find another best friend. Cleo struggles with her long distance relationship with Lewis and feels that they're drifting apart and that maybe he's moving on, leaving her behind. Rikki finds herself in a situation, confused about her returning feelings for Zane and her growing affections for the new guy, who starts to get suspicious of her secret. Bella starts to feel left out of the now group of four mermaids, trying to wrap her head around the fact that Cleo and Rikki never mentioned Emma to her. As their friend groups starts to fall apart, they find themselves changing, developing new powers and tail colors. And on top of that, some of their families are getting closer and closer to discovering their secret. Will the group completely fall apart, or will the changes make them stronger?