- When the daring mermaid princess, Ariel, rescues the human Prince Eric from drowning, she falls in love with him. The little mermaid trades her voice to the scheming sea witch, Ursula, for the chance to become human. Unless Eric falls in love with Ariel in three days, she will become Ursula"s captive forever! Experience the enchanting fairy tale with this beautifully illustrated storybook and read-along CD that features the voices of the beloved characters and thrilling sound effects from the award-winning film!