Nick and Demi are merpeople; both are royalty but Nick ran away from that life and only Demi knows his secret past. It is rumored throughout their underwater world that on every full moon, a merperson, if on land, will grow a pair of legs for as long as the moon is up. Nick finds out that it’s true and during the next full moon he takes Demi with him. She falls in love with a prince and goes to see a sea witch to get legs permanently although she only gets them for three days and her prince must kiss her before her time is up so remain a human. Nick, being the good friend he is, tags along to assist his now mute friend and ends up falling in love with Demi while they are on land trying to win the prince’s heart for Demi. It’s pretty much my own twist on The Little Mermaid.