After the mermaid Ariel married Prince Eric, they lived a blissful life together. Soon, their daughter Melody was born. The little one was mischievous by nature and, unlike her mother, had always yearned for the vibrant and colorful world under the sea. Ariel had never told her about her own origins. 　　 Morgana, the sister of the witch who attempted to harm Ariel in the previous story, sought revenge for her sister. She deceived Melody, promising to turn her into a mermaid. Overjoyed, Melody followed Morgana into the depths of the sea. With their beloved daughter missing, Ariel and Eric grew extremely anxious. To find their child, Ariel decided to return to the sea.