It's the school dance and Cleo and Emma have boy issues. Cleo wants Lewis to ask her and Emma wants Byron, but neither boy gets the message. On top of this, as much as they want to attend, there is the very real risk of water disasters at the dance. Lewis thinks he’s found a way to control the girl's mermaidness in the form of a waterproof spray. It works a treat until of course the girls start going redder than beetroots.
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