Ariel decides travel to the ocean surface again, to watch a celebration for Prince Eric, with whom Ariel falls in love. Ariel needs to be human again and vows to find a way to join Eric. One day, the witch Ursula makes a deal with Ariel to transform her into a human for three days, but within these three days, Ariel must receive the kiss of true love from Prince Eric; otherwise, she will transform back into a mermaid and belong to Ursula.
Ursula does everything to prevent the little mermaid receive her kiss of love. Many adventures await the little mermaid knowing the human world, because Ariel really loves Eric but the evil of her enemy has no limits. She will need courage and strength to achieve her goal and achieve happiness.