Ariel has seen Prince Eric before and wants to be apart of his world. But she knows she can't because of their differences.
Ariel's father, King Triton, has forbid Ariel to be going above water because it is to dangerous. She could be seen by a human and put in danger.
Ariel goes to her aunt Ursula, hoping that she can help her to be with Prince Eric and be in his world. Ursula is willing to help but under one condition. Ariel has to give up her voice to have legs to be bale to walk on land.
Ariel finds Prince Eric and tries to explain that she can't speak, that she's lost her voice. Eric thinks that she is beautiful so he decides to take her back to his castle. With all the time that they have been spending together, they fall deeply in love with each other. Prince Eric and Ariel are going to get married.
Ursula is jealous of Ariel and wants Prince Eric for herself. She decides to take Ariel's voice and use it to get to Eric. Eric hears the voice thinking it's Ariel's and when they are about to get married, Ariel's sea friends come to the rescue.
After Ariel and her sea friends defeat Ursula, Prince Eric is broken away from the spell that Ursula had put on him. Ariel got her voice back and her and Eric get married and live happily ever after. The End.