Ursula's evil spells haven't been working lately because of a bad luck creature. Ariel finds the creature and brings him home, but Ursula still wants to destroy the bad luck creature and whoever owns him.

Sebastian's old perfect friend from his childhood comes to town. When Sebastian gets angry because he's so perfect, Sebastian becomes a pawn in Ursula's plan to take over the kingdom.

King Triton, and the other residents from Atlantica are very happy to know that their hero Apollo is returning to Atlantica. Ariel and Flounder ask Triton who he is, and Triton explains. 20 years ago Atlantica was in a battle between the Octipins who contained a triton that was more magically than King Triton's triton. Apollo, in the vines snuck up on them and broke it. After the story Apollo appears. He and Ariel go on an adventure, but Ariel and Flounder soon find out that his victory over the Atlanticans was an accident. Ursula revives the Octipins and gives them 8 magic tritons, and now Apollo becomes a hero for real.

Ariel treasures her items from the humans of above. She shows her items to Gabriella and she loves them too, but someone else saw Ariel's treasures to. Ursula, and now she's using her evil spells to take control over Ariel's treasure's so they can destroy Atlantica.