The mermaid besties get super excited when their favorite Mystic City celebrity gives them color-changing magic for an important mission.
With darkness threatening Mystic City, Kishiko and Harmonique take a trip to Wintera to find out if there are more mermaids with color-changing fins.
The mermaids discover that their magical fins can return the colors to Mystic City, but the mysterious baddie behind the darkness has other plans.
The shadowy mermaid responsible for Mystic City’s loss of shimmer reveals her identity — and she’s got another color-draining scheme up her sleeve.
The mermaid besties must act fast when Orra’s jealous sister tries to ruin Mystic City’s annual Mermaid Day celebration.