When young adventurist Lily discovers a hidden map leading to a mysterious sea urchin with a crystal shell, she embarks on a perilous quest to uncover the secrets of the ocean's depths and save the world from an ancient curse....

Join the gentle sea urchin, Pearl, on a whimsical journey beneath the waves where she discovers the enchanting world of sea creatures, all harmoniously performing their own version of the "sleepy song" in a coral garden's dreamy symphony....