- 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 that features all new artwork and a read-along CD with the voices of the beloved characters from the award-winning film and thrilling sound effects!