Ariel wants to learn more about humans, so she goes to a humanalogist who makes her day when he tells her that a human is coming under the sea in a metal submarine shaped like a fish.
King Triton wants Ariel to learn how to play the calliope, but Ariel wants to learn how to play the harp. She tries to learn the calliope and her bad playing wakes up an old ancient evil sea monster.