After Sebastian gets kidnapped by some pirates Ariel has to relie on her new bird friend to help her rescue him, but a question of trust is at matter as they start to share a common bond with their new friend Scuttle.

While King Triton's away Sebastian will play. Ssebastian's parents come over,and he lied to them telling them that he is the king of Atlantica. All goes well until King Triton comes home, but when things seem confused Urchin, Ariel, and Flounder get Sebastian out of this mess.

Once again Sebastian gets kidnapped, but this time a mad scientist kidnaps Sebastian for his crab experiments.

Ariel suggests that her family takes a trip up to the frozen north, but something else lies beneth the ice. Dinosaurs, and Ariel thinks that they're adorable so she free's them with her father's triton, but they seem more harmful than adorable. Later on King Triton stops them and after that he uses his triton to destroy all the ice and discover the dinosaurs' home. Now the dinosaur's can roam the land freely thanks to Ariel's curiosity.

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.

The Evil Manta has an evil son who wants to follow in his father's evil footsteps, but he shows signs of good. Ariel finds him, and tries to bring that good out of him.