The story take place probably about seven or eight years after the first movie took place. Ariel is now living on land with Eric and has a daughter name Melody. So Ariel and Eric are having this huge celebration of the fact that now have a child in there family who is human/mermaid. Everything is going great they are having a great time until Morgana shows up and tries to steal Melody. I guess somehow she has to finish the job that her sister Ursula never get to finish. She wants to steal the the triton so she can have all the powers of the ocean. She sents Undertow to make Triton give the triton or his first grandchild. Triton making the obvious choice deciding whether we wants to give up his triton or grandchild. Choose his grandchild of course. But before she has to a chance to seize the triton. Ariel of course now having the protective mother personality trait. Swings into action and knocks Morgana over with a sail. Eric swings onto the rope and Triton shrinks Undertow into a little tubarão so he will harmless. Morgana obviously realize that she has been tricked is furious at Triton. She shouts at Triton and his family saying that this isn't the end Triton it just the beginning. Ariel been scared out of wit ends that Morgana is going to trick her child the same way she did so she could get her wish. She decides to stay on land and not have her or Melody go into the sea. A few years later Melody is now a teenage and has total amor of the sea and has her mother has on land. She told Sebastian that sometimes she pretends she a real life mermaid. She loves to swim but cannot swim very far cause the safety of the seawall. While she out on one of her swims she finds a locket that Triton has given when she was a baby. Eventually she heads in to her 12th birthday party she has a little bit of fun. But feels a little out of place. When she dancing with a good looking guy Sebastianm pinches him in his butt cause she was in a major hurry to get dress. Melody getting embrassed por the whole scene runs upstairs. In her room, she is crying Ariel comes in to comfort her. While they are talking Ariel spots the locket that Melody found and is really mad and upset that Melody went over the sea mural and there huge fallout between them. Melody runs away crying and rows out to sea to see Morgana. When at Morgana she is given a potion to turn her into a mermaid temporily. But Morgana being bend on the triton bribe her to steal it. She goes off a journey toward Atlantica there she meets Tip and Dash there on a journey to try and become somehow heros. When they finally reach the castelo Melody is little bit hesitation about getting the triton cause King Triton is bit in a bad mood about Melody being missing. Melody takes the triton and runs into mom who happens to a be a mermaid! Betrayed Melody is upset with her Mom not telling what to do. Ariel wishing that if had to chance to tell but Melody being a stupid teenager give it to Morgana. It cause Morgana to become really power hungry. She used the triton to lock Melody in a big block of ice saying that time as mermaid is just about up. Luckily Tip and Dash come to rescue to save her. She also the triton to make Undertow big again. Meanwhile after telling after tell Scuttle to get help he manages to get Eric and King Triton. They both try to help but it doesn't work. Only Melody able to end her rain. She stabs Morgana with the triton on her tenacle and throws the triton to King Triton. King Triton really mad that her and her sister have threaten his family he turns her into a block ice. She ends being banish. After that Melody decides to get rid of the dang mural and all the human and merpeople are able to enjoy living in peace with one another.
