The mermaids are getting the hang of their fins. Harmonique is helping Riviera with her newest song that needs to be ready in time for her show at the Coliseum. Unfortunately, they are butting creative heads. Luckily, there's a chance for the two to get some time away from each other - apparently there have been sightings of color changing fins in the city of Wintera. Harmonique sets out with Kishiko to find out the truth. Will Harmonique and Riviera be able to work together? And what will Kishiko and Harmonique discover in Wintera?
